This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cell Wall Synthesis Inhibitors, Subject name: Pharmacology
[{'content': 'Drug of choice for prophylaxis of meningococcal meningitis in a pregnant female after contact with a case is: - \nSelect and explain. \nA. Ciprofloxacin, B. Ceftriaxone, C. Cefalexin, D. Rifabutin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Impoant points to remember about Meningococcal Meningitis Doc for Empirical Treatment ceftriaxone Doc for Definitive Treatment Penicillin G Doc for Prophylaxis ciprofloxacin Doc for Prophylaxis in pregnancy ceftriaxone', 'role': 'assistant'}]