<prompt> Slow waves in EEG is seen inDepressionManiaSchizophreniaDelirium  <response>: schizophrenia: widespread slow activity, dysrhythmia, spikes, and spike-wave complexes generally have been regarded as nonspecific. mood disorders : depression: an increase of alpha andor beta activity left frontal regions in depressed patients. decreased left frontal activation manic episode: Less alpha power and higher EEG frequencies in manic patients with respect to healthy subjects have been interpreted as a sign of overarousal Delirium: diffuse slowing of the background rhythms from alpha 8 to 13 Hz to theta 4.0 to 7.5 Hz activity. Delta activity 3.5 Hz usually does not become prominent until the patient approaches non-responsiveness. The typical changes are slowing or even loss of the posterior dominant rhythm, slow wave increase, reduced reactivity to eye-opening, and intermittent, especially frontally located, rhythmic delta activity FIRDA. EEG changes in mood disorders, schizophrenia are non-specific. The changes in delirium are consistent than other conditions. Considering the best answer to go with D Delirium Reference: Page No.237 1.15 Applied Electrophysiology CTP 