EEG is used in the diagnosis of all except-: (A) Intermittent expulsive disorder, (B) Panic disorder, (C) Anxiety disorder, (D) Bipolar disorder
Answer is A. "EEG findings are frequently normal or show nonspecific changes in Intermittent expulsive disorder"

EEG may be used in Panic disorder, Catatonia, Generalized anxiety disorder, Schizophrenia, mood disorders (including bipolar disorder), Developmental disorders (ADHD, dyslexia, Autism), Alcoholism, Antisocial personality disorder, Borderline personality disorder and dementia.