Which of the following animals can live for the longest duration without drinking water?

Correct answer: (d) Kangaroo rat

Explanation

The kangaroo rat (Dipodomys) never needs to drink water; it survives on metabolic water produced by oxidising dry seeds.

Its kidneys produce highly concentrated urine, minimising water loss.

A camel can last only up to a few months by storing fat in its hump, far less than the kangaroo rat.