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': 'All of the following can precipitate porphyria, except- \nSelect and explain. \nA. Steroids, B. Griseofulvin, C. Estrogen, D. Penicillin', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Penicillin Penicillin is a safe drug in acute intermittent porphyria Drugs precipitating acute intermittent porphvria o Barbiturates o Griseolalvin o Chlorpropramide o Rifampicin o Phenytoin o Sulfonamides o Oral contraceptives o Estrogen", 'role': 'assistant'}]