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
Most common mental disorder as a cause of suicide - 
Select and explain. 
A. Mania, B. Depression, C. Alcohol dependence, D. Schizophrenia
B: Depression
Answer: B: Depression 
Explanation: Psychiatric disorders are the most common cause of suicide. Depression is the most common cause followed by alcoholism.