This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Neoplasia), Subject name: Surgery
[{'content': 'Which cancer develops in chronic ulcer - \nSelect and explain. \nA. Malignant melanoma, B. Basal cell CA, C. Squamous cell CA, D. Kaposi sarcoma', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Squamous cell CA Squamous cell carcinomao Associated with chronic inflammation,o Invariably ulcerated lesion,o Metastasis in 2% cases.", 'role': 'assistant'}]