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
Suicidal tendencies seen in: 
Select and explain. 
A. Depression, B. Substance abuse, C. Schizophrenia, D. All
D: All
Answer: D: All 
Explanation: A i.e. Depression; C i.e. Schizophrenia; B i.e. Substance abuse