NEET BIOLOGY

Detailed explanation-1: -So, the correct answer is ‘Mammals’.

Detailed explanation-2: -Mammals. Large mammals, such as primates, cattle, horses, some antelopes, giraffes, hippopotamuses, rhinoceroses, elephants, seals, whales, dolphins, and porpoises, generally are pregnant with one offspring at a time, although they may have twin or multiple births on occasion.

Detailed explanation-3: -Live birth, also known as viviparity, is common throughout the animal world, and not just among mammals. It has emerged in fish, amphibians, insects, and arachnids, to name a few.

Detailed explanation-4: -Animals that give birth to babies are called mammals. So, the animals, reproducing the babies of their own kind, by directly giving birth, are called mammals. For example, human beings are mammals. Cats, dogs, cows, horses, elephants, goats, pigs, lions, rats, squirrel etc.

Detailed explanation-5: -Of the 6, 495 mammal species recognized in 2018 (Burgin et al., Journal of Mammalogy vol. 99), 6, 111 are placentals, 379 are marsupials, and 5 are monotremes. Placentals and marsupials are viviparous, meaning they give birth to live offspring.