This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Aplastic Anemia, Subject name: Pathology
[{'content': 'Drugs causing aplastic anaemia include: \nSelect and explain. \nA. Chlorpromazine, B. Allopurinol, C. Diclofenac, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Common drugs & toxins implicated in etiology of aplastic anemia: Drugs Chemicals A. Dose-dependent action - Cytotoxic drugs Benzene B. Idiosyncratic action Insecticides (Organophosphates, organochlorine) Antibacterials (Sulphonamides, Chloramphenicol) Pentachlorophenol (an antibacterial, fungicide & wood-preservative) Anti-inflammatory drugs (Phenylbutazone, Indomethacin, piroxicam, Diclofenac, Naproxen) Antirheumatics (Gold, penicillamine) Antiepileptics (Phenytoin, Carbamazepine) Antithyroids Tranquilizers (Chlorpromazine) Others-Furosemide, Allopurinol', 'role': 'assistant'}]