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
A patient seen a rope and fears like a snake. It is called: 
Select and explain. 
A. Husion, B. Hallucination, C. Delusion, D. Depresonalization
A: Husion
Answer: A: Husion 
Explanation: A i.e. Illusion