This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Bone marrow depressive drugs in the treatment of AIDS patient are except \nSelect and explain. \nA. Didanosine, B. Zalcitabine, C. Cotrimaxazole, D. Ganciclovir', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Drugs causing bone marrow suppression in patients with HIV infection Zidovudine Dapsone Trimethoprim Pyrimethamine. 5-flucytosine Gancyclovir Interferon alpha Foscarnet. Refer CMDT 2010/454', 'role': 'assistant'}]