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How much amount of volume of air is in lungs as FRC?

1. \( 1500 \mathrm{ml} \) to \( 1600 \mathrm{ml} \)
2. 2100 m| to 2500 m1
3. 2500 \( \mathrm{ml} \) । to \( 3000 \mathrm{ml} \)
4. 1600 \( \mathrm{ml} \) to \( 2100 \mathrm{ml} \)

Correct answer: 1600 \( \mathrm{ml} \) to \( 2100 \mathrm{ml} \)

Solution

Functional residual capacity (FRC) is the volume remaining in the lungs at the end of a normal expiration. In adults, this is typically about 1600 to 2100 mL, which matches the correct option.

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