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
Nerve commonly involved in fracture distal shaft of the humerus 
Select and explain. 
A. Radial nerve, B. Medial, C. Ulnar, D. Circumflex Brachial nerve
A: Radial nerve
Answer: A: Radial nerve 
Explanation: 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