This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory System, Subject name: Physiology
[{'content': 'The volume in question mark is after: \nSelect and explain. \nA. Maximum inspiration, B. Maximum expiration, C. Normal inspiration, D. Normal expiration', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Maximum expiration(Ref: Ganong, 25th ed/p.629)It is residual volumeIt is the volume of air left in lungs after forced expiration', 'role': 'assistant'}]