This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Paial claw hand is caused by lesion involving the: March 2010, March 2013 (a, b) 
Select and explain. 
A. Radial nerve, B. Ulnar nerve, C. Median nerve, D. Anterior interosseous nerve
B: Ulnar nerve
Answer: B: Ulnar nerve 
Explanation: Ans. B: Ulnar Nerve