From the following relationship between respiration volumes and capacities, mark the correct option.
(i) Inspiratory Capacity (IC) `=` Tidal Volume + Residual Volume
(ii) Vital Capacity (VC) = Tidal Volume (TV) + Inspiratory Reserve Volume (IRV) + Expiratory Reserve Volume (ERV)
(iii) Residual Volume (RV) = Vital Capacity (VC) - Inspiratory Reserve Volume (IRV)
(iv) Tidal Volume (TV) = Inspiratory Capacity (IC) - Inspiratory Reserve Volume (IRV)

Options

A. (i) incorrect, (ii) Incorrect, (iii) Incorrect, (iv) Correct
B. (i) Incorrect, (ii) Correct, (iii) Incorrect, (iv) Correct
C. (i) Correct, (ii) Correct, (iii) incorrect, (iv) Correct
D. (i) Correct, (ii) Incorrect, (iii) Correct, (iv) Incorrect

Answer

b

Explanation

(i) Inspiratory Capacity (IC) = Tidal Volume + Inspiratory Reserve Volume (TV + IRV)
(ii) Vital Capacity (VC) Tidal Volume +.lnspiratory Reserve Volume + Expiratory Reserve Volume. (TV+ ERV+ IRV)
(iii) Residual Volume (RV) Volume of air remaining in the lungs after a forcible expiration.
(iv) Tidal Volume (TV) Volume of air inspired or expired during a normal respiration.