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': 'First to appear amongst the ossification centres about the elbow is: \nSelect and explain. \nA. Radial Head, B. Olecranon, C. Lateral epicondyle, D. Capitellum', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Capitellum', 'role': 'assistant'}]