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: ENT
A child was treated for H. Influenza meningitis for 6 month. Most impoant investigation to be done before discharging the patient is: 
Select and explain. 
A. MRI, B. Brainstem evoked auditory response, C. Growth screening test, D. Psychotherapy
B: Brainstem evoked auditory response
Answer: B: Brainstem evoked auditory response 
Explanation: H. Influenza Type Meninigtis It is frequent in children between the ages of 3 and 12 months. Residual auditory deficit is a common complication. - Ghai 6th/ed Since, residual auditory deficit is a common complication of H. influenza meningitis, audiological test to detect the deficit should be performed before discharging any patient suffering from H. influenza meningitis. In children best test to detect hearing loss is brainstem evoked auditory response.