The char5acteristic(s) common to urea, uric acidn and ammonia is/are
(i). Theya re nitrogenous wastes.
(ii). They all need very largwe amount of water for excretion.
(iii). They are all equally toxic.
(iv). They are produced in the kidneys

Options

A. (i),(iii) and (iv)
B. (i) only
C. (i) and (iii)
D. (i) and (iv)

Answer

B

Explanation

Urea, uric acid and ammonia are known as nitrogenous wastes as they are produced during protein metabolism. Ammonia needs very large amount of water for exretion, second in order comes urea and then uric acid. Ammonia is highly toxic, then comes urea and then uric acid. Ammonia is highly toxic, then comes urea and then uric acid. Ammonia and urea are produced in the liver and uric acid is formed mostly in the liver and to some extent in kidneys.