This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pelvis and Hip injuries, Subject name: Orthopaedics
[{'content': 'Treatment of choice for one-week old fracture neck femur at 65 years age is \nSelect and explain. \nA. Hemi-replacement ahroplasty, B. Closed reduction and internal fixation by cannulated cancellous screws, C. Closed reduction and internal fixation by Austin more pins, D. Total hip replacement', 'role': 'user'}, {'content': 'Answer: B \nExplanation: ref : maheswari 9th ed', 'role': 'assistant'}]