Question

Which of the following is incorrect about kidney?

• A. It is the primary excretory organ in humans.
• B. It helps in purifying the blood.
• C. It is bean-shaped.
• D. It produces urea.

Answer 1

The correct option is D It produces urea.

Kidney, a bean-shaped organ helps in the excretion of nitrogenous wastes. It filters these wastes from the blood and forms urine. Liver converts ammonia into urea. Excretory system is involved only in the excretion of urea.