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 of the following are bactericidal except- 
Select and explain. 
A. Cephalexin, B. Rifampicin, C. Isoniazid, D. Oxytetracycline
D: Oxytetracycline
Answer: D: Oxytetracycline 
Explanation: Ans. is 'd' i.e., Oxytetracycline o All cell wall synthesis inhibitors are bactericidal. o All antibacterial drugs that act on cell membrane are bactericidal. o All first line antitubercular drugs are bactericidal except ethambutol that is bacteriostatic. o All protein synthesis inhibitors are bacteriostatic except aminoglycosides & streptogramins which are bactericidal. o All drugs affect intermediary metabolism are bacteriostatic.