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': 'Bone marrow apalsia is seen with all except ? \nSelect and explain. \nA. Methicillin, B. Chloramphenicol, C. Alpha methyl hydantoin, D. Phenylbutazone', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Methicillin Causes of drug induced aplastic anemia Antibiotics Chloramphenicol Cotrimoxazole Nitroforantoin Antiinflammatory Phenylbutazone lndomethacin Diclofenac Antithyroid Carbimazole Methimazole Methylthiouracil Psychotropic Phenothiazine Anticonvulsant Phenytoin (alpha methyl hydantoin) Antirheumatic Gold salts D penicillamine Cytotoxic drugs Vincristine Adriamycin Methotrexate Chlorambucil", 'role': 'assistant'}]