This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
[{'content': 'A patient presented with the extension of the MCP joint and flexion of IP which muscle is affected \nSelect and explain. \nA. Extensor digitorum, B. Abductor pollicis brevis, C. Abductor pollicis longus, D. Interossei and lumbricalis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Extension of MCP and flexion of IP joints is due to palsy of lumbrical and interossei muscles Action of lumbricals = flexion of Mcp,,extension of IP Tnt Action of palmar interossei =adduction of fingers Action of dorsal interossei =abduction of fingers ref : BD CHAURASIA', 'role': 'assistant'}]