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: Pharmacology
[{'content': 'Topical mitomycin–C is used in : \nSelect and explain. \nA. Sturge–Weber syndrome, B. Laryngotracheal stenosis, C. Endoscopic angiofibroma, D. Skull base osteomyelitis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Mitomycin is an anti-tumor antibiotic with an alkylating agent like property. It is used in superficial cancer of the urinary bladder and for squamous cell carcinoma of the anus.\nThe drug has radiomimetic effects and also sensitizes hypoxic tumor cells to the effects of hypoxia.\nApplication of topical mitomycin C after endoscopic dilation of laryngotracheal stenosis reduces the rate of restenosis.', 'role': 'assistant'}]