This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
The risk factor for suicide is? 
Select and explain. 
A. Increased serotonin, B. Drug abuse, C. Female sex, D. Married person
B: Drug abuse
Answer: B: Drug abuse 
Explanation: Ans.B-Drug abuseCauses/Risk factors for suicidePsychiatric disorders: - Depression (most common), alcoholism (2nd mc), Drug/Substance 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.