This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti Microbial, Subject name: Pharmacology
[{'content': 'Bacteriostatic anti - TB drug is \nSelect and explain. \nA. Pyrazinamide, B. INH, C. Rifampin, D. Ethambutol', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Ethambutol All first line drugs are tuberculocidal except ethambutol which is tuberculostatic:* Tuberculocidal: Rifampin, INH, streptomycin, pyrazinamide.* Tuberculostatic : Ethambutol, PAS, cycloserine, thioacetazone.", 'role': 'assistant'}]