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': 'All of the following muscles are involved in inspiration except \nSelect and explain. \nA. Scalene, B. Internal intercostal muscle, C. Diaphragm, D. Stermocleidomastoid', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Internal intercostal muscle is involved in expiration.\nExternal intercostal muscle is involved in inspiration.', 'role': 'assistant'}]