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: Anatomy
[{'content': 'A patient was on DVT prophylaxis. All of the following has perforators which connect superficial veins to the deep veins, except? \nSelect and explain. \nA. Ankle, B. Below the inguinal ligament, C. Mid calf, D. Lower thigh', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Below inguinal ligament.Blood flows from the superficial to the deep veins through perforating (communicating veins)Perforators are located- below the medial malleolus (inframalleolar perforator)- in the medial calf (Cockett perforators)- just above (Dodd perforator) & below the knee (Boyd perforator)- at the level of the adductor canal (Hunterian perforator)', 'role': 'assistant'}]