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: Surgery
Winging of scapula is seen in paralysis of which muscle? 
Select and explain. 
A. Serratus anterior, B. Supraspinatus, C. Pectoralis major, D. Infraspinatus
A: Serratus anterior
Answer: A: Serratus anterior 
Explanation: Ans. is 'a' i.e., Serratus anterior