This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'Most common serotype causing meningococcus epidemics is \nSelect and explain. \nA. A, B. W - 135, C. C, D. Y', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Meningococal Meningitis Causative agent : N.meningitidis,a gran negative diplococci Serotypes A, B, C, D, 29E,W135,X,Y World wide Group A is the MC cause of Meningococcal Epidemics (except in America), especially in Sub saharan African belt Recently Group B, W-135, Y cases have staed increasing in World Epidemics caused by : A, C > B> W-135, Y Ref: Park 23rd edition Pgno : 166', 'role': 'assistant'}]