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': "Marjolin's ulcer (after burn) predisposes to: \nSelect and explain. \nA. Basal cell carcinoma, B. Squamous cell carcinoma, C. Adenocarcinoma, D. Round cell carcinoma", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans: B i.e. Squamous cell carcinoma Skin malignancy The strongest predisposing factor for basal cell carcinoma is ultraviolet radiation When a squamous cell carcinoma appears in a scar, it is known as Marjolin's ulcer", 'role': 'assistant'}]