(A) Inhaled air is the atmospheric air that we breathe in. Atmospheric air contains approximately $21 \%$ oxygen,$78-79 \%$ nitrogen,and $0.03 \%$ car

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(A) Inhaled air is the atmospheric air that we breathe in. Atmospheric air contains approximately $21 \%$ oxygen,$78-79 \%$ nitrogen,and $0.03 \%$ carbon dioxide.

Class 11 Biology Breathing and Exchange of Gases Introduction

Easy

The percentage of oxygen in inhaled air is about (in $\%$)

A
$21$
B
$16$
C
$79$
D
$4$

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The percentage of oxygen in inhaled air is about (in $\%$)

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