Daily Quiz For UPSC Ki Taiyari Q_. मनुष्य में श्वसन में बाहर निकली वायु में O2 की मात्रा होती है ? [A] 14 प्रतिशत [B] 16 प्रतिशत [C] 20 प्रतिशत [D] 25 प्रतिशत Q. In human respiration, what is the percentage of oxygen (O2) in the exhaled air? [A] 14 percent ...
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