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': 'Pulled elbow is \nSelect and explain. \nA. A sprain of extensor tendons, B. Dislocation of head of radius, C. Fracture of lateral condyle of humerus, D. Dislocation of elbow', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Dislocation of head', 'role': 'assistant'}]