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': 'A patient with hip in adduction and medial rotation and is unable to move probable diagnosis is - \nSelect and explain. \nA. Posterior dislocation head of femur, B. Fracture shaft of femur, C. Fracture neck of femur, D. Sciatica', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]