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
Drug locally used for tracheal stenosis is : 
Select and explain. 
A. Mitomycin C, B. Doxorubicin, C. Bleomycin, D. Clindamycin
A: Mitomycin C
Answer: A: Mitomycin C 
Explanation: None