Detailed Instructions: In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
Problem:Question: What is the maximum volume of air that a subject can breathe out after maximum inspiration ?:
Options: <1> Total lung capacity. <2> Expiratory reserve volume. <3> Inspiratory capacity <4> Vital capacity <5> Residual volume
Solution:
4