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': 'Normal expiratory reserve volume of adult? \nSelect and explain. \nA. 500 ml, B. 3000 ml, C. 1200 ml, D. 4500 ml', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., 1200 ml(Ref: Ganong 24n/e p.629)Inspiratory reserve volume - 3000 mlExpiratory reserve voulume -1200 ml", 'role': 'assistant'}]