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B
2
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C
3
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D
4
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Solution
The correct option is B
2
The correct option is B.
The kidney is one of the excretory organs of the human body. This organ has a role in the filtration of blood and removes salts, excess amounts of water, and nitrogenous waste. It transfers all the waste materials from the blood and forms urine, which is excreted from the body.
The kidney is located below the rib cage on each side, which means it is two in number.
It has microscopic cells called Nephrons are known as the Excretory Unit.