Q.

The sum of ERV, TV and IRV is 

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a

FRC

b

EC

c

VC

d

TLC

answer is D.

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Detailed Solution

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Vital Capacity (VC) is the sum of expiratory reserve volume (ERV), tidal volume (TV) and inspiratory respiratory volume (IRV).

Functional Residual Capacity (FRC) = ERV+RV

Total Lung Capacity (TLC) = RV, ERV, TV and IRV or VC+RV

Expiratory Capacity (EC) = TV+ERV

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The sum of ERV, TV and IRV is