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
[{'content': 'Entrapment neuropathy at the arcase of frohse involves which nerve? \nSelect and explain. \nA. Median nerve, B. Posterior interosseous nerve, C. Ulnar nerve, D. Axillary nerve', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Posterior interosseous nerve", 'role': 'assistant'}]