This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Varicose Veins, Subject name: Surgery
[{'content': 'Great saphenous vein canulation is done at- \nSelect and explain. \nA. Ant to medial malleolus, B. At fossa ovalis, C. Above popliteal fossa, D. None', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Ant. to medial malleolus o Saphenous removes cut down at ankle provide excellent access. It is reliably found 1cm. anterior and 1 cm. superior to the medial malleolus. o Saphenous venous cut down at ankle provides excellent access. It is reliably found 1 cm. anterior and 1 cm. superior to the medial malleolus.", 'role': 'assistant'}]