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': 'During normal inspiration diaphragm goes down by? \nSelect and explain. \nA. 1-2 cm, B. 3-5 cm, C. 5-7 cm, D. 7-9 cm', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 1-2 cmIn normal inspiration, the diaphragm descends 1-2 cm into the abdominal cavity producing a pressure difference of 1-3 mm hg and the inhalation of about 500 ml of air.", 'role': 'assistant'}]