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': 'A patient with leprosy presents with clumsiness of hand. His ulnar nerve is affected. Clumsiness is due to palsy of which muscle - \nSelect and explain. \nA. Extensor carpi ulnaris, B. Abductor pollicis brevis, C. Oppenens pollicis, D. Interosseous muscle', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Clumsiness is due to paralysis of muscles which are involved in fine movement i.e., interossei, lumbricals and hypothenar muscles.', 'role': 'assistant'}]