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': 'FRC is volume of air in lung after ? \nSelect and explain. \nA. Maximal inspiration, B. Maximal expiration, C. Normal inspiration, D. Normal expiration', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. is d i.e., Normal expiration', 'role': 'assistant'}]