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 used for trabeculectomy 
Select and explain. 
A. Mitomycin-C, B. Azathioprine, C. Cituximab, D. Ketorolac
A: Mitomycin-C
Answer: A: Mitomycin-C 
Explanation: The main reason of failure of trabeculectomy surgery is scarring and closure of drainage site
 Antimetabolites prevent scarring and can be used to increase the success rate of trabeculectomy
 The most commony used antimetabolites are mitomycin-C and 5-fluorouracil.