This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fracture of the Humerus, Subject name: Orthopaedics
[{'content': 'Axillary nerve damage is caused by damage to? \nSelect and explain. \nA. Shaft of humerus, B. Surgical neck humerus, C. Medial epicondyle, D. Lateral epicondyle', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. (b) Surgical neck humerusRef.'.Grant's atlas of anatomy, 12/e, p 524)", 'role': 'assistant'}]