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: Orthopaedics
[{'content': 'In Carpal tunnel syndrome, features are of - \nSelect and explain. \nA. Compression of ulnar nerve, B. Compression of median nerve under the flexor retinaculum, C. Anaesthesia over thenar eminence, D. Atrophy of hypothenar muscles', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The carpal bones form an arch which is convex on the dorsal side of the hand and concave on the palmar side.\nThe groove on the palmar side is covered by flexor retinaculum, thus forming carpal tunnel.\nCarpal tunnel syndrome is caused by compression of median nerve.', 'role': 'assistant'}]