<prompt> A perception experienced in the absence of an external stimulus in clear consciousness is:DelusionHallucinationIllusionPseudohallucination  <response>: Ans. B. Hallucination3 criteria are essential for definition of hallucination:A Percept-like experience in the absence of an external stimulus;B Percept-like experience that has the full force and impact of a real perception; andC Percept-like experience that is unwilled, occurs spontaneously, and cannot be readily controlled by the percipient 