<prompt> Rope mistaken for a snake, is an example of -IllusionDelusionHallucinationNone  <response>: Ans. is a i.e. Illusion Illusiono Illusions are altered perception in which a real external object is combined with imagery to produce false internal percept. In simple words, illusion is misinterpretation of an actual sensory input. For example:-i Mistaking a stick or rope for snake in dark room:- Stick is a real external object, which is perceived falsely as snake.ii Hearing once name in a train whistle:- Train whistle is a real external stimulus, which is perceived as once name false internal percept.In illusion:-i Sensory input is in external atmosphere.ii Percept is in internal atmosphere inner subjective space, i.e., inside the mindo Illusions are most commonly seen in delirium. 