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
All are true about rifampicin EXCEPT ? 
Select and explain. 
A. Microsomal enzyme inducer, B. Used in treatment of meningiococcal meningitis, C. May cause OCP failure, D. Bactericidal in nature
B: Used in treatment of meningiococcal meningitis
Answer: B: Used in treatment of meningiococcal meningitis 
Explanation: 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.