This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Symptoms and signs in psychiatry and classification, Subject name: Psychiatry
Rope mistaken for a snake, is an example of 
Select and explain. 
A. Illusion, B. Perception, C. hallucination, D. Synaesthesia
A: Illusion
Answer: A: Illusion 
Explanation: * ILLUSION= altered perception of a real object * Mistaking a rope for a snake there are some specific type of illusions PAREIDOLIC ILLUSION==vague stimulus (like clouds) are perceived as something known to the patient (image of a dog) Ref. kaplon and sadock synopsis of psychiatry