The correct option is D RV (Residual Volume); ERV (Expiratory Reserve Volume);
TV (Tidal Volume); and IRV (Inspiratory Reserve Volume)
Total lung capacity (TLC) is the maximum volume of air present in the lungs after forceful inspiration.
It is the sum of residual volume (RV), expiratory reserve volume (ERV), inspiratory reserve volume (IRV), and tidal volume (TV).
TLC = RV + ERV + TV + IRV