This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Nerve commonly involved in fracture distal shaft of the humerus \nSelect and explain. \nA. Radial nerve, B. Medial, C. Ulnar, D. Circumflex Brachial nerve', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Radial nerve is the most commonly injured nerve in fracture shaft humerus It is paicularly common in oblique fracture at junction of middle and distal third bone', 'role': 'assistant'}]