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': 'Adduction of thumb occurs at: \nSelect and explain. \nA. Inter carpal joint, B. MCP joint, C. Carpometacarpal joint, D. Inter phalangeal joint', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Carpometacarpal joint 1st carpometacarpal joint (cmj) is the only cmj with seperate joint cavity so the movements are much free. Flexion- extension (in the plane of palm), adduction - abduction (at right angles to the plane of palm), opposition & circumduction, movements of thumbQ take place at 1st CM Joint.', 'role': 'assistant'}]