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
In a case of primary melanoma of 1-2mm depth, margins of excision of surrounding normal skin should be - 
Select and explain. 
A. 0.5-1 cm, B. 1 cm, C. 1-2 cm, D. > 2cm
C: 1-2 cm
Answer: C: 1-2 cm 
Explanation: Ans. is'c' i.e., 1-2 cm[Ref: Fitzpatrick Vh/e p. 1153)