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': 'Mesna is given with cyclophosphamide to : \nSelect and explain. \nA. Increase absorption, B. Decreased excretion, C. Ameliorate hemorrhagic cystitis, D. Decrease metabolism', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]