The following substances are the excretory products in animals. Choose the least toxic from among them

Options

A. Urea
B. Uric acid
C. Ammonia
D. Carbon dioxide

Answer

B

Explanation

Nitrogenous waste substances such as ammonia, urea or uric acid are produced during protein metablism according to the species. Small amount of nitrogenous waste substances are also produced during the metabolism of nucleic acids. Ammonia is the most toxic, followed by urea and uric acid. the latter is the least toxic.