FRC in lung capacities is-

IRV+TV

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IRV+RV

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ERV+RV

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ERV-RV

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Solution

The correct option is C ERV+RV
FRC is functional residual capacity, which is the amount of air remaining in the lungs at the end of a normal exhalation. It is calculated by adding together residual and expiratory reserve volumes.
Normal value of FRC= RV+ERV= 1800-2200 ml.

So, the correct answer is option 'c'.

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