This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Antimetabolites and Quinolones, Subject name: Pharmacology
[{'content': 'Which of the following drug can be used for prophylaxis of meningococcal meningitis? \nSelect and explain. \nA. Chloramphenicol, B. Erythromycin, C. Tetracycline, D. Ciprofloxacin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: MENINGOCOCCAL MENINGITIS DOC for empirical treatment: Ceftriaxone DOC for definitive treatment: Penicillin G DOC for mass prophylaxis: Ciprofloxacin Most effective drug for prophylaxis: Ceftriaxone Other drugs for prophylaxis: Rifampicin, Minocycline', 'role': 'assistant'}]