This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skin, Subject name: Pathology
[{'content': 'Rodent ulcer is- \nSelect and explain. \nA. Infectious ulcer, B. Hypersensitivity, C. Basal cell carcinoma, D. Squamaous cell carcinoma', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 6c' i.e., Basal cell carcinoma o Advanced basal cell carcinoma may ulcerate and extensive local invasion of bone or facial sinus may occur after many years of neglected or in unusually aggressive tumors, explaining the archaic designation rodent ulcer.", 'role': 'assistant'}]