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 he done is ? 
Select and explain. 
A. ABER, B. EEG, C. Developmental screening test, D. ECG
A: ABER
Answer: A: ABER 
Explanation: Ans. is 'a' i.e., ABER o After H. influenza meningitis sensorineural hearing loss occurs in 5-10% of patients during long term follow up. o Therefore Auditory Brain Stem Evoked Response is done to check the peripheral auditory system.