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: Skin
[{'content': 'In a case of primary melanoma of 1-2mm depth, margins of excision of surrounding normal skin should be - \nSelect and explain. \nA. 0.5-1 cm, B. 1 cm, C. 1-2 cm, D. > 2cm', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is'c' i.e., 1-2 cm[Ref: Fitzpatrick Vh/e p. 1153)", 'role': 'assistant'}]