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': 'A woman aged 60 yrs suffers a fall; her lower limb is extended and externally rotated; likely diagnosis is: \nSelect and explain. \nA. Neck of femur fracture, B. Interochanteric femur fracture, C. Posterior dislocation of hip, D. Anterior dislocation of hip', 'role': 'user'}, {'content': "Answer: A \nExplanation: An aged woman presents with extended & externally rotated lower limb following a fall indicates fracture of neck of femur. Ref: Essential Ohopedics By Maheshwari 2nd Edition, Page 197 ; Apley's System of Ohopaedics and Fractures, 8th Edition, Page 685", 'role': 'assistant'}]