Illusion is:: (A) A false unshaken belief not keeping one's sociaocultural background, (B) Perception without stimuli, (C) Abnormal perception by a sensory misinterpretation of actual stimulus, (D) Fear of closed spaces
Answer is C. Illusion is an abnormal perception caused by a sensory misinterpretation of actual stimulus, sometimes precipitated by strong emotion, e.g. fear provoking a person to imagine they have seen an intruder in the shadows. REF : Oxford text book of psychiatry 3rd Ed.