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
Rathi, 26 years old female diagnosed to be suffering from depression. Now for the past 2 days had suicidal tendency, thought & ideas. The best treatment is - 
Select and explain. 
A. Amitryptiline, B. Selegiline, C. Haloperidol + CPZ, D. ECT
D: ECT
Answer: D: ECT 
Explanation: Treatment of choice for suicidal depression is ECT.