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': 'Thromboembolism after pelvic surgery is usually from the veins - \nSelect and explain. \nA. iliac, B. Calf, C. Femoral, D. Pelvic', 'role': 'user'}, {'content': 'Answer: C \nExplanation: • MC site of DVT: Calf veins (soleal veins)\n• MC site thrombosis for pulmonary thromboembolism: Femoropopliteal veins\n• Calf veins are the most common site of DVT in post-operative period, but risk of embolism from calf venous thrombosis is extremely low.\n• DVT of femoropopliteal veins are the most common site of pulmonary thromboembolism.', 'role': 'assistant'}]