A 20-year-old boy complains of hearing of voices and aggressive behavior for last 2 days. He had fever before the onset of these symptoms. The family members report that he has been muttering to self and gesticulating as if he is talking to someone. There is no history of any past psychiatric illness. The likely diagnosis is:

Ans. B. Acute psychosis* The duration of symptoms is less than one month. Also please remember that in a large number of cases acute psychosis is preceded by fever, hence don't get confused.* In this case if the history also mentioned disturbances of consciousness or history of disorientation, the likely diagnosis would be delirium.