False perception with stimuli is known as:

Correct option is C

Ans. (c)
Sol. An illusion is a false or distorted perception of a real external stimulus. For example, mistaking a rope for a snake in dim light. It differs from hallucinations, which occur without any external stimulus, and from delusions, which are false beliefs.
Explanation of each option:
· (a) Hallucination – A false perception without any actual external stimulus (e.g., hearing voices when alone).
· (b) Delusion – A false belief held despite evidence to the contrary (e.g., thinking one is a king).
· (c) Illusion – Correct answer. A misinterpretation of an actual stimulus (e.g., optical illusions).
· (d) Mania – A mood disorder characterized by hyperactivity, euphoria, and impulsiveness—not related to false perception.