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
Winging of the scapula is due to injury to: 
Select and explain. 
A. Nerve supplying serratus anterior, B. Pectoral nerve, C. Subscapular nerve, D. Ulnar nerve
A: Nerve supplying serratus anterior
Answer: A: Nerve supplying serratus anterior 
Explanation: Nerve supplying serratus anterior