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: Forensic Medicine
False perception without any external stimulus is: AIIMS 06; Kerala 08, 09; COMEDK 13 
Select and explain. 
A. Illusion, B. Hallucination, C. Delirium, D. Delusion
B: Hallucination
Answer: B: Hallucination 
Explanation: Ans. Hallucination