This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology Pa 1 (Gram Positive Cocci, Gram Negative Cocci), Subject name: Microbiology
Xavier and Yogender stay in the same hostel of same university, Xavier develops infection due to group B meningococcus. After few days , Yogender develops infection due to Group - C meningococcus. All the following are true statement except: 
Select and explain. 
A. Educate students about meningococcal trans-mission and take preventive measures, B. No Chemoprophylaxis available against both group B and group C, C. Vaccine prophylaxis of contacts of Xavier, D. Vaccine prophylaxis of contacts of Yogendra
B: No Chemoprophylaxis available against both group B and group C
Answer: B: No Chemoprophylaxis available against both group B and group C 
Explanation: Chemoprophylaxis is neccesory for contacts - DOC for carriers and prophylaxis- Ciprofloxacin ,Rifampicin , ceftriaxone. Option 1 Risk factors: Overcrowding and semi-closed communities Travellers (Hajj pilgrims) and smoking Viral and Mycoplasma infection Option 2,3,4 FDA has approved Serogroup B meningococcal vaccines (Recombinant) - (Bexsero and Trumenba) Treatment: * DOC for treatment - Ceftriaxone and cefotaxime