Which of the following species is the largest of the 'toothed-whales’?

Correct answer: (c) Sperm whale

Explanation

The Sperm whale (cachalot) is the largest of the toothed whales, identified by its huge square head.

Males reach about 16–20 metres and weigh up to about 45 tonnes; it is a deep diver.

Blue Whale and Finback whale are larger but are baleen (filter-feeding) whales, not toothed.