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
The screening investigation of high risk neonates in ICU for suspected hearing loss is: 
Select and explain. 
A. Otoacoustic emissions, B. Free field audiometry, C. Stapedial reflex testing, D. Pure tone audiometry
A: Otoacoustic emissions
Answer: A: Otoacoustic emissions 
Explanation: The screening investigation of choice of high-risk neonates in ICU for suspected hearing loss is otoacoustic emissions.