This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: CNS Infections, Subject name: Pediatrics
[{'content': 'In a small child diagnosed with H. influenza meningitis, what investigation must be done before discharging him from the hospital? \nSelect and explain. \nA. BERA, B. MBI, C. CT scan, D. X ray skull', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) BERARef: OP Ghai 8th ed./619; OskisPediatrics: Principles & Practice by Julia A. McMillan', 'role': 'assistant'}]