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: Pharmacology
[{'content': 'Commonest site for osteochondritis dissecans in the elbow is NOT RELATED- OHO \nSelect and explain. \nA. Trochlea, B. Radial head, C. Capitulum, D. Olecranon', 'role': 'user'}, {'content': 'Answer: C \nExplanation: .', 'role': 'assistant'}]