Medical
Biology
Upper Respiratory Tract
Question

The bar graph given above shows the composition of the inhaled air in humans. A person is standing in an open field. Write the number of the correct bar of the inhaled air by that person.

1
2
3
4
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Solution

The proportion of gases in atmosphere is

O2 : 20.8%, N2 : 79%,  and  CO2 : 0.03%.

The second bar is representing the most appropriate proportion of gases in atmosphere, which the person inhales.