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: Surgery
[{'content': 'Excision of head of radius in a child should not be done because \nSelect and explain. \nA. It produces instability of elbow joint, B. It leads to secondary Osteo ahritis of elbow, C. It causes subluxation of inferior radio-ulnar joint, D. It causes myositis ossificans.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. It causes subluxation of inferior radioulnar joint', 'role': 'assistant'}]