This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'The approximate amount of air left in the lungs after maximal forced expiration in a normal woman is \nSelect and explain. \nA. 0.5 L, B. 2.0 L, C. 1.1 L, D. 1.8 L', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]