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Solution


Q.

The kidneys in human beings are a part of the system for :
1 Nutrition  
2 Respiration  
3 Excretion  
4 Transportation  

Ans.

(3)

Kidneys are the bean shaped reddish brown paired organs in human beings. These are a part of excretory system that helps in the process of urine formation. Thus kidneys help in excretion.