GK (Science)

India's demographic transition shows declining birth rates and death rates typical of development, with urbanization being a key driver. High potential + high actual growth (B) describes an earlier phase. Partial industrialization (C) is not a demographic indicator. Urbanization increases as societies develop through the demographic transition.

Statement 1 is incorrect: India's sex ratio (933 in 2001) was HIGHER than the 1991 figure (927), showing an improvement. Statement 2 is incorrect: India's population has NEVER decreased at any census since 1901 - it has grown continuously including 1951-61. Therefore, both statements are wrong.

As per the 2001 Census, India had 35 million-plus cities (cities with population over 1 million). This is a factual recall question from census data.

Statement 1 is correct: Andaman-Nicobar tribes (Jarwa, Onge, Sentinelese) are Negrito. Statement 4 is correct: Indo-Aryans are classified as Nordic in traditional racial anthropology. Statement 2 is incorrect: Central Indian tribes (Gond, Bhil) are Proto-Australoid, not Mongoloid. Statement 3 is incorrect: Northeast tribes are Mongoloid, not Negroid. Therefore only 1 and 4 are correct.

According to the 2001 Census, Sikkim had the highest sex ratio (female per 1000 males) in the 0-6 age group among Indian states. This is a factual recall question from census data.

The aboriginal populations of the Andaman Islands (Jarwa, Onge, Great Andamanese, Sentinelese) belong to the Negrito racial category, characterized by short stature, dark skin, and frizzy hair. They are among the oldest human populations.

The question asks which pairs are NOT correctly matched. Pair 1 (Daman and Diu - Lowest % urban) is INCORRECT - Daman and Diu had very HIGH urbanization (~36%), not lowest. Pair 4 (Arunachal Pradesh - Lowest density) is INCORRECT - Arunachal had the second-lowest density after Sikkim, but the actual lowest density state was different. Pairs 2 (Puducherry sex ratio >1000) and 3 (Himachal lowest sex ratio) are correctly matched.

According to the 1991 Census, Himachal Pradesh had the lowest level of urbanization among Indian states. This is a factual recall question about census data on urbanization patterns across states.

Tamil Nadu had the highest urban population percentage (43.86% in 2001 Census), followed by Maharashtra (42.4%), Gujarat (37.3%), and Andhra Pradesh (27.1%). The descending order is Tamil Nadu > Maharashtra > Gujarat > Andhra Pradesh, which matches option B exactly. Maharashtra ranks higher than Gujarat despite Gujarat's industrial base, due to Mumbai's massive urban agglomeration.

Punjab and Haryana had the lowest sex ratios among Indian states in 1991 Census. Both states have historically shown strong gender bias due to son preference in agricultural communities. Punjab typically had the lowest sex ratio (around 874 females per 1000 males), with Haryana close behind. Andhra Pradesh and Karnataka had better ratios, while Punjab-Rajasthan pair would not be the lowest as Rajasthan's ratio was higher than Haryana's.

Mizoram has the highest proportion of Christians in India at approximately 87% (2001 Census), due to widespread missionary activities since the 1890s. Nagaland also has a high Christian percentage but slightly lower than Mizoram. Kerala has significant Christian population but only around 19%. Goa's Christian population is around 26%, concentrated in coastal areas. Northeastern states, particularly Mizoram and Nagaland, dominate the top positions.

Population density (1991): Punjab was highest (407 persons/sq km), followed by Assam (257), Gujarat (211), and Orissa (203). The descending order Punjab > Assam > Gujarat > Orissa matches option D. Punjab's high density comes from fertile agricultural land, while Assam's density reflects its riverine plains. Gujarat's density is moderate due to large arid regions in Kutch. Option B is incorrect because it places Gujarat ahead of Punjab, which is not factual.

Tharu tribes are native to the Terai region (Uttaranchal/Uttar Pradesh foothills), making option (a) correct. Bhotia are actually found in Uttaranchal (not UP as stated). Munda tribes are primarily in Jharkhand and parts of Odisha, West Bengal, Bihar - not exclusively Bihar. Kol tribes are found in Madhya Pradesh, Maharashtra, and parts of eastern India - not Rajasthan. The question tests specific tribal-state associations, with only the Tharu-Uttaranchal match being geographically accurate.

Sikkim has the highest percentage of small population (population <200) due to its mountainous terrain and numerous scattered hamlets. The tiny Himalayan state has many remote villages with very small populations. Jammu and Kashmir has some remote areas but also large urban centers. Himachal Pradesh has small settlements but not as high a percentage as Sikkim. Manipur has more concentrated populations in the Imphal valley. Sikkim's unique geography and settlement patterns make it exceptional for this metric.

Two-thirds of India's urban population lives in Class I cities (population 100,000 or more). Class I cities dominate the urban landscape, containing the majority of urban residents due to urban agglomeration and migration. This reflects the primacy of metropolitan areas and large urban centers in India's urbanization pattern. The concentration is so high that it accounts for about 65-70% of total urban population, making 'Two-third' the correct answer.

Jammu and Kashmir has the largest proportion of rural population among Indian states due to limited urbanization. Kerala has the highest female-to-male ratio (sex ratio) at over 1000 females per 1000 males. Maharashtra has a high proportion of urban population (42.4% in 2001). Uttar Pradesh had the highest rate of population growth in the 1991-2001 decade due to demographic momentum. This matches option C: A(5), B(3), C(4), D(2). The other combinations mix up these demographic facts incorrectly.

Statement 1 is correct: West Bengal had the highest population density in 1991 (~767 persons/sq km). Statement 2 is incorrect: Uttar Pradesh did not have the highest growth rate - it was high but not the highest. Statement 3 is correct: Rajasthan had the lowest female literacy. Statement 4 is correct: Kerala had the highest literacy rate. Therefore, only statements 1, 3, and 4 are correct, matching option B. Statement 2 is the incorrect one that must be excluded.

The population decline between 1911-1921 was primarily caused by epidemics, most notably the Spanish influenza pandemic of 1918-1919, which killed millions. Natural hazards occurred but were not the primary cause of the decade's decline. Preventive checks (birth control) were minimal in that era. International migration was not significant enough to cause net decline. The 1911-1921 period is unique in Indian census history as the only decade with negative growth, attributable almost entirely to disease outbreaks.

Urban size-classes in 1991 Census: Class IV (>20,000) had the most places, followed by Class III (>10,000), Class V (>5,000), and Class VI (<5,000). The descending order of number of places is IV > III > V > VI, matching option C. Smaller size classes (V, VI) have fewer places because many small settlements don't qualify as urban. The largest urban centers (Class I) are fewer in number but contain more population. This question tests understanding of urban hierarchy distribution.

The 1911-1921 decade experienced negative population growth due to the devastating impact of the influenza pandemic, World War I, and associated famines that claimed millions of lives. All other census decades showed positive population growth rates.

The Fifth Five Year Plan (1974-79) saw the highest investment per enterprise in the public sector due to large-scale investments in heavy industries, infrastructure projects, and nationalization of key sectors like banking and insurance.

The migration of Anglo-Indians to Australia after British rule ended is a historical fact, making Assertion A true. However, Reason R states that migrations are caused by religious attraction, which is unrelated to the migration of Anglo-Indians seeking better economic or social prospects in Commonwealth countries.

The correct matching based on female literacy rates from Census data: Assam (22.4%), Gujarat (41.3%), Karnataka (44.9%), Maharashtra (78.9%). This matches option B with A-3, B-4, C-2, D-1.

The main objective behind the Damodar Valley Cooperation was the flood control. So option 1 is right.

The Konyak tribe is primarily found in Nagaland, not Kerala. Kerala's major tribal groups include tribes like Kadars, Malayarayan, and Muthuvan, but not Konyaks. Konyaks are one of the major Naga tribes known for their headhunting traditions.

The largest permanent migration of Indians abroad in the last century was associated with sugarcane plantations, particularly under the indentured labor system (girmit system) to Fiji, Mauritius, Guyana, Trinidad, and other colonial territories from late 19th to early 20th century.

Population explosion occurs when there's a high birth rate combined with a low death rate, creating a large positive natural increase. This happens during the demographic transition when death rates decline due to better healthcare, sanitation, and nutrition, but birth rates remain high.

Based on female literacy rates: Mizoram (78.60%), Lakshadweep (72.89%), Andaman and Nicobar Islands (66.99%), Delhi (65.46%). Option C correctly matches A-3, B-4, C-1, D-2.