system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
The most common causative agent of meningitis in the age group of 6 months-3 year amongst the following is -
assistant
The correct answer is  Ans is 'b' i.e., H. influenza o Amongst the given options, H. influenzae is the best answer because pneumococcus and meningococci are not there in options.