<prompt> 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:Educate students about meningococcal trans-mission and take preventive measuresNo Chemoprophylaxis available against both group B and group CVaccine prophylaxis of contacts of XavierVaccine prophylaxis of contacts of Yogendra  <response>: 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 