To solve this problem, we need to understand the components of lung volumes and capacities.$\newline$Vital capacity (VC) is the maximum amount of air a person can expel from the lungs after a maximum inhalation.$\newline$It is calculated as the sum of the following lung volumes:$\newline \bullet$Inspiratory Reserve Volume (IRV): The additional air that can be inhaled after a normal inhalation.$\newline \bullet$Expiratory Reserve Volume (ERV): The additional air that can be exhaled after a normal exhalation.$\newline \bullet$Tidal Volume (TV): The amount of air inhaled or exhaled during normal breathing.$\newline$Therefore, the formula for Vital Capacity is:$\newline$VC = IRV + ERV + TV$\newline$Now, let's evaluate the options:$\newline \bullet$Option 1: ERV + ERV (Incorrect, as it does not include IRV or TV)$\newline \bullet$Option 2: IRV + ERV + TV + RV (Incorrect, as it includes Residual Volume (RV), which is not part of VC)$\newline \bullet$Option 3: ERV + ERV + TV + RV (Incorrect, as it repeats ERV and includes RV)$\newline \bullet$Option 4: IRV + ERV + TV (Correct, as it matches the formula for VC)$\newline$Therefore, the correct option is Option 4.