This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NEET Jan 2020, Subject name: Dental
A farmer presented with a black mole on the check. It increased in size, more than 6mm with sharply defined borders with central black lesion, what could be the diagnosis? 
Select and explain. 
A. Acral lentigo melanoma, B. Superficial spreading melanoma, C. Lentigo maligna melanoma, D. Nodular melanoma
B: Superficial spreading melanoma
Answer: B: Superficial spreading melanoma 
Explanation: Superficial spreading melanoma It is the M/C type of melanoma It is the M/C type which occurs in a patient with pre existing mole. R/F for superficial spreading melanoma- Increasing age Melanoma in situ Many melanocytic nevi Multiple >5 atypical nevi Strong family H/O melanoma