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
Entrapment neuropathy at the arcase of frohse involves which nerve? 
Select and explain. 
A. Median nerve, B. Posterior interosseous nerve, C. Ulnar nerve, D. Axillary nerve
B: Posterior interosseous nerve
Answer: B: Posterior interosseous nerve 
Explanation: Ans. is 'b' i.e., Posterior interosseous nerve