<prompt> The risk factor for suicide is?Increased serotoninDrug abuseFemale sexMarried person  <response>: Ans.B-Drug abuseCausesRisk factors for suicidePsychiatric 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 serotoninOther - Male sex, Age 40 years, Single Unmarried, divorced or widowed, previous suicide attempt, social isolation. 