<prompt> Suicidal tendencies seen in -a Depressionb Posttraumatic stress disorderc Schizophreniad Substance abusee Anxietyabcadacdbde  <response>: CausesRisk 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. 