General Knowledge: Science, Animals & Vocabulary

The cerebrum is the largest part of the human brain, making up about 85% of its weight, and handles higher functions like thought, memory, language, and sensory processing. The cerebellum coordinates movement, and the medulla controls vital automatic functions like breathing and heart rate.

Calcium phosphate, specifically in the form of hydroxyapatite, makes up about 65% of bone weight and gives bones and teeth their hardness and rigidity. Calcium carbonate is found in seashells and eggshells, not in human bones.

Iron is the central component of hemoglobin, the protein in red blood cells that carries oxygen throughout the body. Each hemoglobin molecule contains four iron atoms that bind oxygen. Iron deficiency leads to anemia.

Immense means extremely large in scale or size. Its antonyms are tiny and minute, both meaning very small. Genuine means authentic, and decrease means to make smaller, which are not direct opposites.

Amenable means open and responsive to suggestion; agreeable; willing to cooperate. Intractable means hard to control or deal with; stubborn, which is a valid antonym. Principal means main, simplify means to make simpler, and clear means obvious.

To boycott means to withdraw from commercial or social relations with a country, organization, or person as a punishment or protest. To patronize means to be a regular customer or client, which is the opposite action of boycotting. Undermine means to weaken, suave means smoothly polite, and experienced means skilled.

To boycott means to refuse to buy or use something as a protest. To patronize means to support or be a customer of, which is the opposite action. Undermine means to weaken or damage, suave means smoothly charming, and peaceful means not violent.

To cadge means to beg or get something by asking (often food or money). To earn means to gain through work or effort, which is the opposite of getting something by asking. Dull means boring, experienced means practiced, and urban means city-related.

P. Sainath, the renowned journalist and winner of the Ramon Magsaysay Award in 2007 for his reporting on rural issues, worked with The Hindu newspaper. He is best known for his work on rural poverty and farmer distress through his 'Rural Affairs' column.

Singrauli, located in Madhya Pradesh and Uttar Pradesh, is known as 'The Energy Hub of India' due to its massive concentration of thermal power plants and coal mines. It generates thousands of megawatts of electricity for the national grid.

Catfish have an extraordinary number of taste buds - over 100,000 located all over their bodies, particularly on their barbels (whiskers) and fins. This allows them to detect food sources in murky waters where vision is limited. Humans have only about 10,000 taste buds, sharks have very few, and dolphins have even fewer than humans. The catfish's exceptional sense of taste is a key adaptation for their bottom-feeding lifestyle.

A group of crows is collectively called a "murder." This term has been used since at least the 15th century and appears in various literary works. Other collective nouns for birds include a "gaggle" of geese, a "flock" of sparrows or pigeons. The term "murder" for crows likely stems from folklore and superstitions associating crows with death or bad omens.

A squid has 10 tentacles in total: 8 shorter arms and 2 longer tentacles. The arms are used for grasping and manipulating prey, while the two longer tentacles are used specifically for capturing prey from a distance. Many people confuse octopuses (8 arms) with squids (10 appendages). Sharks, dolphins, and humans are not relevant to this question about cephalopods.

Giraffes have exceptionally high blood pressure, about twice that of humans, because their hearts must pump blood with enough force to overcome gravity and reach their brains 5-6 meters up their long necks. Among the listed animals, giraffes have the highest blood pressure.

Giant pandas' diet consists almost entirely (about 99%) of bamboo. They consume different parts of the bamboo plant including leaves, stems, and shoots. Despite being classified as carnivores, pandas evolved to specialize in bamboo consumption.

The primary function of kidneys is to filter blood and remove waste products and excess substances from the body, producing urine. While kidneys do help regulate blood pressure indirectly through the renin-angiotensin system, their main purpose is waste removal and filtration, not blood pressure control directly.

Hemoglobin is the iron-containing protein in red blood cells responsible for carrying oxygen from the lungs to body tissues and returning carbon dioxide. This oxygen transport function is essential for cellular respiration. Hemoglobin does not directly prevent or cause anemia - it's the molecule whose deficiency causes anemia.

Sharks are fish, not mammals. They belong to the class Chondrichthyes (cartilaginous fish). Key differences from mammals include: gills instead of lungs, cold-blooded metabolism, and they lay eggs or give live birth unlike mammalian pregnancy. The multiple hyphens in options C and D appear to be placeholder errors.