<prompt> Clouding of consciousness is seen in:DementiaDeliriumSchizophreniaDepression  <response>: Ans. b DeliriumRef.: Harrison 19th ed. 166DELIRIUM It is characterized by global impairment of consciousness clouding of consciousness, resulting in reduced levels of alertness, attention perception of environment along with acute onset of fluctuating cognitive impairment. It is the commonest organic mental disorderClinical Features Diagnosis Global impairment of consciousness attention is the hallmarkcardinal feature of Delirium. It manifests as: Diminished ability to focus, sustain or shift attention. Reduced levels of alertness, attention, and perception of environment. Drowsiness mental slowness, distractibility disorientation. Global impairment of cognition is manifested as: Disorientation in time, place and person Disturbance of immediate recent memory Remote memory is intact. 