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: Anatomy
[{'content': 'Froment signs is positive in injury of which nerve? \nSelect and explain. \nA. Median, B. Ulnar, C. Radial, D. None of the above', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e.,Ulnar", 'role': 'assistant'}]