This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: ENT
[{'content': 'Topical Mitomycin C is useful in treatment of \nSelect and explain. \nA. Angiofibroma, B. Tracheal stenosis, C. Skull base Osteomyelitis, D. Laryngeal carcinoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Dilation for laryngotracheal stenosis is typically done using serial dilation using various sizes of Jackson bronchoscopes. The various studies have showed that mechanical dilation used alone can have a recurrence rate of stenosis of greater than 90%. Thus, various adjunctive procedures have been developed in order to try to decrease the rate of restenosis. Mitomycin-C is an example of one of these adjunctive agents. Ref : Internet sources', 'role': 'assistant'}]