This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'Prophylaxis of meningococcal meningitis is? \nSelect and explain. \nA. Ciprofloxacin, B. Rifampicin, C. Penicillin, D. Gentamycin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The drugs of choice for mass prophylaxis includes ciprofloxacin,minocycline,spiramycin and ceftriaxone Reference; Park&;s Textbook of preventive and social medicine, 24th edition.Pg no. 176', 'role': 'assistant'}]