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': 'Air volume in lung after normal expiration is called as ? \nSelect and explain. \nA. FRC, B. ERV, C. RV, D. TC', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., FRCFRC is the amount of air remaining in the lungs after a normal tidal expiration (FRC = ERV + RV).", 'role': 'assistant'}]