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': 'Pa of ethambutol in RNTCP regime ? \nSelect and explain. \nA. Bactericidal + detrimental to semidormant bacilli, B. Bactericidal + detrimental to dormant bacilli,, C. Bactristatic + detrimental to fast multiplying bacilli, D. Bacteristatic + detrimental to slow multiplying bacilli', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Bactristatic + detrimental to fast multiplying bacilli Ethambutol It is selectively bacteriostatic and is active against MAC as well as some other mycobacteria. Fast multiplying bacilli are more susceptible With the triple drug therapy it hastens the sputum conversion and also helps to prevent the development of resistance (primary purpose of using it). It inhibits arabinosyltransferase involved in arabinogalactan synthesis, therby interfering with mycolic acid incorporationin mycobacterial cell wall.", 'role': 'assistant'}]