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
The drug that should be used for prophylaxis of close contacts of a patient suffering from meningococcal meningitis is : 
Select and explain. 
A. Rifampicin, B. Dapsone, C. Erythromycin, D. Amikacin
A: Rifampicin
Answer: A: Rifampicin 
Explanation: None