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
Most common muscle to be congenitally absent - 
Select and explain. 
A. Teres major, B. Pectoralis major, C. Gastrosoleus, D. Semimembranosus
B: Pectoralis major
Answer: B: Pectoralis major 
Explanation: Congenital absence of Pectoralis major is the most common.