This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vascular surgery, Subject name: Surgery
[{'content': 'Perforators are not present at: \nSelect and explain. \nA. Ankle, B. Medial calf, C. Distal to calf, D. Below inguinal ligament', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Perforators Location (IN CBD HUNTERS) Below the medial malleolus (Inframallelor Perforators/May or kuster) In the medial calf (Cockett&;s Perforators) Just below the knee (Boyd&;s perforators) Just above the knee (Dodd&;s Perforators) At the level of adductor canal (Hunterian Peforators) Ref: Sabiston 20th edition Pgno: 1828', 'role': 'assistant'}]