This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti Microbial, Subject name: Pharmacology
[{'content': 'Empirical drug of choice for treatment of meningococcal meningitis is: \nSelect and explain. \nA. Cefoxitin, B. Ceftriaxone, C. Cefotetan, D. Gentamicin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref: Harrison 19th ed. P 767* Ceftriaxone is the empirical drug of choice for treatment of meningitis. It is frequently combined with vancomycin.', 'role': 'assistant'}]