This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mood Disorders, Subject name: Psychiatry
[{'content': 'The technique of Psychological autopsy is useful in studying the causation of \nSelect and explain. \nA. Schizophrenia, B. Personality disorders, C. Drug dependence, D. Suicide', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Etiology: Some of the common causes of suicide are: Psychiatric Disorders are a major cause of suicide. Some common causes are: Depression: Major depression Depression secondary to serious physical illness. Reactive depression, secondary to life stressors, e.g. family and/or marital disputes, failure in goal achievement, occupational and financial difficulties, and death of significant others. Alcoholism and drug dependence Schizophrenia Genetic factors (a concordance rate of 18% in monozygotic twins) and biochemical factors (low levels of 5-HIAA) are impoant in some case of suicide.', 'role': 'assistant'}]