This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemotherapy, Subject name: Pharmacology
[{'content': 'Drug used in prophylaxis of H. Influenza is \nSelect and explain. \nA. Doxycycline, B. Rifampicin, C. Erythromycin, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Rifampicin is drug of choice for prophylaxis of Meningococcal meningitis. H. Influenza meningitis Refer Harrison 19th/205', 'role': 'assistant'}]