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': 'As per CEAP classification varicose veins come under which clinical grade \nSelect and explain. \nA. 0, B. 1, C. 2, D. 3', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Varicose veins come under clinical grade 2 as per CEAP classification.', 'role': 'assistant'}]