This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Peripheral nerve injuries, Subject name: Orthopaedics
[{'content': 'Pointing index sign is seen in ____ nerve palsy - \nSelect and explain. \nA. Ulnar nerve, B. Radial nerve, C. Median nerve, D. Axillary nerve', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pointing index sign or oschner&;s clasp test : in median nerve injury ( at a level proximal to elbow). When both hands are clasped together , index & middle finger ,fail to flex due to the loss of action of long finger flexors of index & middle fingers ( digitorum superficilais & lateral half of digitorum profundus ) . The other fingers can be flexed by the functioning medial side of the flexor digitorum profundus , supplied by the ulnar nerve. REF:textbook of ohopedics, John Ebenezer, 4th edition pg.no. 338', 'role': 'assistant'}]