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
Wrist drop is seen with ? 
Select and explain. 
A. Radial nerve palsy, B. Median nerve palsy, C. Ulnar nerve palsy, D. Posterior interosseous nerve palsy
A: Radial nerve palsy
Answer: A: Radial nerve palsy 
Explanation: Ans. is 'a' i.e., Radial nerve palsy