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': 'Which of the following is primarily a bactericidal drug? \nSelect and explain. \nA. Chloramphenicol, B. Gentamicin, C. Sulphadiazine, D. Tetracycline', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Aminoglycosides: Streptomycin, Gentamicin, Amikacin,\xa0Neomycin, etc.\xa0are considered as bactericidal drugs.', 'role': 'assistant'}]