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
[{'content': 'Rope mistaken for a snake, is an example of \nSelect and explain. \nA. Illusion, B. Perception, C. hallucination, D. Synaesthesia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: * 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', 'role': 'assistant'}]