Hallucinations, true is -

Ans. is 'c' i.e., There is no external stimulus o Characteristics of HallucinationsAbsence of corresponding external perceptual stimuli.Vividness, force and reality value of a normal perception.The experience occurs spontaneouslyIt cannot be produced or terminated at will by subject (not in conscious or voluntary control).Perceived as being in external objective space.Have relative permancy (i.e. remain constant and unchanged).Hallucinations are usually experienced alongside and simultaneously with normal perception.