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 sees a rope and fears like a snake. It is called - 
Select and explain. 
A. Illusion, B. Hallucination, C. Delusion, D. Depersonalization
A: Illusion
Answer: A: Illusion 
Explanation: The real object, i.e. rope is misinterpreted as snake → illusion.