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: Orthopaedics
[{'content': 'Maximum shortening of limbs occur in - \nSelect and explain. \nA. Trochantric # femur, B. Post dislocation of hip, C. # neck femur, D. Anterior dislocation of hip', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Amongst the given options, maximum shortening occurs with posterior dislocation of hip.', 'role': 'assistant'}]