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: Anatomy
Which of the following do NOT elevate the ribs - 
Select and explain. 
A. Serratus posterior superior, B. Serratus posterior inferior, C. External intercostals, D. Levatores costarum
B: Serratus posterior inferior
Answer: B: Serratus posterior inferior 
Explanation: Muscles that elevate the ribs are the muscles of inspiration. Serratus posterior inferior is a muscle of expiration.