Which among the following nitrogenous wastes requires the least water for its excretion?

Answer: [D] Uric Acid

Uric acid is not soluble in water and is excreted as a dry crystal by the animal’s digestive system. Ammonia is the most toxic nitrogenous waste and must be excreted in large volumes of water.

This question is a part of GKToday's Integrated IAS General Studies Module