This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Treatment, Subject name: Psychiatry
[{'content': 'ECT is mainly indicated in: \nSelect and explain. \nA. Severe depression, B. Schizophrenia, C. Somatization disorder, D. Hysteria', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans: a (Severe depression)Indications for Use of Electroconvulsive TherapyDiagnoses for which ECT may be indicatedMajor diagnostic indications- Major depression, unipolar and bipolarPsychotic depression, in particular-Mania, including mixed episodes-Schizophrenia with acute exacerbationCatatonic subtype, particularlySchizoaffective disorder-Other diagnostic indicationsParkinson's diseaseNeuroleptic malignant syndromeIntractable seizure disorderClinical indicationsPrimary use-Rapid definitive response required on medical or psychiatric grounds-Risks of alternative treatments outweigh benefits-Past history of poor response to psychotropics or good response to ECT-Patient preferenceSecondary use-Failure to respond to pharmacotherapy in the current episode-Intolerance of pharmacotherapy in the current episode-Rapid definitive response necessitated by deterioration of patient's condition", 'role': 'assistant'}]