This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thigh, Knee,Leg,Foot & Ankle injuries, Subject name: Anatomy
[{'content': 'In fracture of femur by which pa popliteal aery is commonly damaged by- \nSelect and explain. \nA. Proximal fragment, B. Distal fragment, C. Muscle haematoma, D. Tissue swelling', 'role': 'user'}, {'content': "Answer: B \nExplanation: *In distal third shaft fracture or supracondylar femur fracture, the distal fragment is tilted backward due to strong gastrocnemius pull. This posteriorly tilted distal fragment can cause popliteal aery injury. Ref: Apley's 9th/e p. 865", 'role': 'assistant'}]