This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Elbow injuries, Subject name: Orthopaedics
[{'content': 'Commonest dislocation of elbow is ? \nSelect and explain. \nA. Anterior, B. Posterior, C. Both same, D. Medial', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Posterior dislocation is the commonest dislocation of elbow. It may be associated with fracture of medial epicondyle, fracture of head of the radius, or fracture of coronoid process of the ulna. Clinically there is severe pain at elbow.triceps tendon stands prominent. The three bony points relationships are reversed. Associated with median nerve palsy. Diagnosis by x-ray. Ref: Essential Ohopaedics, Maheswari & Mhaskar, Edition 9th Page no: 105', 'role': 'assistant'}]