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Which gas do humans take in during respiration?

Answer and explanation

Correct answer: Oxygen

Humans take in oxygen-rich air, and oxygen is used by cells during aerobic respiration to help release energy from food. Thus, option A is correct. Carbon dioxide is mainly produced as a waste product and exhaled, not taken in for cellular energy release. Nitrogen is abundant in air but is not used directly in ordinary human respiration, while hydrogen is not the required respiratory gas.

Related tags

OxygenRespirationCellular RespirationLife ProcessesClass 10 ScienceScienceClass 10 Mcq

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