This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper limb, Subject name: Anatomy
The ape-thumb deformity occurs due to lesion of 
Select and explain. 
A. Radial nerve, B. Median nerve, C. Ulnar nerve, D. Musculocutaneous nerve
B: Median nerve
Answer: B: Median nerve 
Explanation: Injury to the median nerve at the wrist is much more common than at the elbow. This is due to the superficial position of the nerve at this site.It produces Ape thumb deformity where the thenar muscles are wasted, and the thumb is adducted and laterally rotated.Ref: BD Chaurasia; volume 1; 6th edition