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 are examples of bactericidal drugs except - \nSelect and explain. \nA. INH, B. Rifampicin, C. Ethambutol, D. Pyrazinamide', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Ethambutol o All first line drugs are tuberculocidal except ethambutol which is tuberculostatic. Tuberculocidal --> Rifampin, INH, streptomycin, pyrazinamide. Tuberculostatic --> Ethambutol, PAS, cycloserine, thioacetazone.", 'role': 'assistant'}]