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: Medicine
Zidovudine toxicity is increased by all except 
Select and explain. 
A. Azithromycin, B. Probencid, C. Cisplatin, D. Cyclophosphamide
A: Azithromycin
Answer: A: Azithromycin 
Explanation: None