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 are true about rifampicin EXCEPT ? \nSelect and explain. \nA. Microsomal enzyme inducer, B. Used in treatment of meningiococcal meningitis, C. May cause OCP failure, D. Bactericidal in nature', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Used in treatment of meningiococcal meningitis o Rifampicin is used for prophylaxis of meningococal meningittis (not for treatment). o Other three options are correct.", 'role': 'assistant'}]