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
All of the following muscles are involved in inspiration except 
Select and explain. 
A. Scalene, B. Internal intercostal muscle, C. Diaphragm, D. Stermocleidomastoid
B: Internal intercostal muscle
Answer: B: Internal intercostal muscle 
Explanation: Internal intercostal muscle is involved in expiration.
External intercostal muscle is involved in inspiration.