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
Mesna is given with cyclophosphamide to : 
Select and explain. 
A. Increase absorption, B. Decreased excretion, C. Ameliorate hemorrhagic cystitis, D. Decrease metabolism
C: Ameliorate hemorrhagic cystitis
Answer: C: Ameliorate hemorrhagic cystitis 
Explanation: None