This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nerves of Upper Extremity, Subject name: Anatomy
[{'content': "Froment's sign is characteristically seen in - \nSelect and explain. \nA. Ulnar nerve injury, B. Median nerve injury, C. Radial nerve injury, D. Intercostobrachial nerve injury", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Ulnar nerve injury o Repeat from All India Dec-15", 'role': 'assistant'}]