Population of India: Census, Tribes, and Migration

Transhumance is the seasonal movement of livestock and herders between fixed summer and winter pastures. It typically involves moving animals from valley floors in winter to high mountain pastures in summer, then back again. This is distinct from nomadic migration (which is more permanent) or ranch movements.

The Census Act of 1948 provided the legal framework for conducting censuses in independent India. This Act was passed to institutionalize the census process, which had been conducted since 1881 under British rule but needed proper legislation after independence. The first census under this Act was conducted in 1951.

Among eastern Indian states, Mizoram has the highest proportion of scheduled tribes in its population, with tribal communities constituting over 90% of the state's population. This makes Mizoram unique among eastern states. While other northeastern states like Manipur, Nagaland, and parts of Assam have significant tribal populations, Mizoram has the highest percentage.

Lepchas is the original tribal group of Sikkim.

The Registrar General and Census Commissioner of India, headquartered in Delhi, is the official authority responsible for conducting the decennial census. This office operates under the Ministry of Home Affairs and coordinates the massive nationwide exercise of population enumeration. The position was established in 1949 and has conducted every census since independence.

The indigenous tribes of the Andaman Islands, such as the Great Andamanese, Onge, Jarwa, and Sentinelese, are classified as Negrito. This racial category is characterized by short stature, dark skin with tightly curled hair, and is believed to represent one of the earliest human migrations out of Africa. Negrito is distinct from Negroids (African racial classification) and other categories listed.

The Tharu tribe is indeed native to the Terai region, which spans both present-day Uttaranchal (Uttarakhand) and Uttar Pradesh. Option (a) correctly states this association. Options (b), (c), and (d) contain incorrect state associations - Bhotia is associated with Uttarakhand, Munda with Jharkhand/Odisha, and Kol with Chhattisgarh/Jharkhand.

The largest permanent migration of Indians in the 20th century was to sugarcane plantation colonies like Fiji, Mauritius, Guyana, Trinidad, and Suriname. Over 1.5 million Indians were transported as indentured laborers under the British indenture system between 1838 and 1920. Unlike temporary migration for petrodollars or professionals, this was permanent settlement. Rubber and tea plantations had smaller migrations.

Konyak is a Naga tribe native to Nagaland in Northeast India, not Kerala. Option (c) is incorrectly matched. All other options are correct: Tharu (Uttar Pradesh), Gaddi (Himachal Pradesh), and Toda (Tamil Nadu) are all correctly paired with their respective states. The question asks for the INCORRECT match.

The period 1911-1921 saw India's only population decline in modern census history, primarily due to devastating epidemics including the Spanish Flu pandemic (1918-1919), influenza, plague, and other diseases. World War I and related disruptions contributed but epidemics were the primary cause. Natural hazards, preventive checks, and international migration were not significant enough factors to cause a net decline.

Throughout Indian history, villages have been settled primarily based on access to essential resources, with water being the most critical factor. Fuel (firewood), agricultural land, and building materials are secondary considerations. Behavioral patterns don't determine settlement location. While flat land is desirable, it is not the primary criterion - many hill villages exist where water and resources are available.

Statement 1 is correct - Andaman-Nicobar tribes (Great Andamanese, Onge, Jarwa, Sentinelese) are Negrito. Statement 4 is also correct - Indo-Aryans are classified under the Nordic race in traditional racial classifications. Statements 2 and 3 are incorrect - Central Indian tribes are Proto-Australoid, not Mongoloid, and Northeast Indian tribes are Mongoloid, not Negroid.