<prompt> Suicide is most common in ?DepressionAlcohol dependenceDementiaSchizophrenia  <response>: Ans. is a i.e., Depression CausesRisk factors for suicide Psychiatric disorders : - Depression most common, alcoholism 2nd mc, DrugSubstance dependence, Schizophrenia, Dementia. Physical illness : - Cancer, AIDS, Multiple sclerosis, Head trauma. Psychosocial factors : - Failure in love, marital difficulties, family dispute, illegitimate pregnancy. Biological factors : - Decrease in serotonin Other - Male sex, Age 40 years, Single Unmarried, divorced or widowed, previous suicide attempt, social isolation. 