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': 'Injury to the Ulnar nerve at the wrist causes paralysis of - \nSelect and explain. \nA. Apposition of the thumb, B. Abduction of the carpo-metacarpal joint of the thumb, C. Adduction of the thumb, D. Flexion of the MCP joint of the middle finger', 'role': 'user'}, {'content': 'Answer: C \nExplanation: In low ulnar nerve palsy\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Adducttion of thumb is lost\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Ulnar claw hand\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Medial one and half fingers sensory loss\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Clumsy grip\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Loss of flexion at metacarpophalangeal joints.', 'role': 'assistant'}]