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
Which of the following drug can be used for prophylaxis of meningococcal meningitis? 
Select and explain. 
A. Chloramphenicol, B. Erythromycin, C. Tetracycline, D. Ciprofloxacin
D: Ciprofloxacin
Answer: D: Ciprofloxacin 
Explanation: 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