<prompt> Person at night looks at the window and frightens. Wife switches the light on and turns out that window cover is having a shape like a man. This is -HallucinationIllusionDelusionHyperacusis  <response>: Ans. is b i.e. illusion o Altered perception of real object i.e presence of external stimulus - Illusiono False perception without external stimulus - Hallucination. Here in this question external stimulus is present in the form of man shaped window cover. So it is an example of illusion.o A delusion is a disorder of thought content characterized by false, firm unshakeable belief that is not accepted by other members of patients culture and societyo Hyperacusis is perceiving normal sounds as abnormally loud. 