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Respiration

gas plays a v...

Question

gas plays a very important role in the respiration of human beings.

A

Nitrogen

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B

Oxygen

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C

Carbon dioxide

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Solution

The correct option is B Oxygen
Oxygen is essential for respiration in all the living organisms. During respiration, oxygen is inhaled and carbon dioxide is exhaled.
The inhaled oxygen is essential for driving energy from the food consumed as it helps in breaking down the food molecules.

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