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