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Easy 2 views · Science

Which gas is essential for respiration in humans?

A
Carbon dioxide
B
Oxygen
C
Nitrogen
D
Helium
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🇮🇳 हिंदी Hindi Version
मनुष्यों में श्वसन के लिए कौन सी गैस आवश्यक है?
A
कार्बन डाइऑक्साइड
B
ऑक्सीजन
C
नाइट्रोजन
D
हीलियम
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