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
Which of the following drug is used for mass prophylaxis for prevention of meningococcal meningitis 
Select and explain. 
A. Ciprofloxacin, B. Rifampicin, C. Ceftriaxone, D. Minocycline
A: Ciprofloxacin
Answer: A: Ciprofloxacin 
Explanation: Rifampicin was used formerly but now Ciprofloxacin is the preferred drug for mass prophylaxis for prevention of meningococcal meningitis.