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': 'Triangular relation of Elbow is maintained in \nSelect and explain. \nA. Fracture ulna, B. Anterior dislocation of Elbow, C. Posterior dislocation of Elbow, D. Supracondylar fracture', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Supracondylar fracture', 'role': 'assistant'}]