This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacterial infection, Subject name: Medicine
Which is the drug of choice for prophylaxis of meningococcal meningitis in pregnancy: 
Select and explain. 
A. Penicillin, B. Ceftriaxone, C. Rifampicin, D. Ampicillin
B: Ceftriaxone
Answer: B: Ceftriaxone 
Explanation: N. meningitidis is dangerous because it can cause Waterhouse Friderichsen syndrome & Addisonian crisis So, chemoprophylaxis is recommended Ceftriaxone as a single IM or IV injection is highly effective in carriage eradication and can be used at all ages and in pregnancy