This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
Prior to discharge of a patient of H. influenza meningitis the essential investigation to be done is – 
Select and explain. 
A. ABER, B. EEG, C. Developmental screening test, D. BOG
A: ABER
Answer: A: ABER 
Explanation: After H. influenza meningitis sensor neural hearing loss occurs in 5-10% of patients during long term follow up.
Therefore Auditory rain Stem Evoked Response is done to check the peripheral auditory system.