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
Illusion is a disorder of ? 
Select and explain. 
A. Thought, B. Perception, C. Affect, D. Emotion
B: Perception
Answer: B: Perception 
Explanation: Ans, B. PerceptionDisorders of perceptionAltered perception - Sensory distoion (micropsia, hyeracusis), Illusion.False perception - Hallucination.