This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast, Subject name: Surgery
Winging of scapula is seen after mastectomy due to injury: 
Select and explain. 
A. Musculocutaneous nerve, B. Long thoracic nerve of Bell, C. Intercostobrachial nerve, D. Thoracodorsal nerve
B: Long thoracic nerve of Bell
Answer: B: Long thoracic nerve of Bell 
Explanation: Winging of scapula is seen after mastectomy due to injury of long thoracic nerve .