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: Psychiatry
Patient can hear music every time when he turns on the tap and hears the sound of water. This is an example of : 
Select and explain. 
A. Reflex hallucination, B. Functional hallucination, C. Visual hallucination, D. 1st person auditory hallucination
B: Functional hallucination
Answer: B: Functional hallucination 
Explanation: Functional hallucination : here the stimulus and perecption are in same modality.
V/S
Reflex hallucination : here the stimulus and pereception are in different modality.