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
Treatment of choice for endogenous depression with suicidal tendency - 
Select and explain. 
A. Lithium, B. Chlorpromazine, C. ECT, D. Psychoanalysis
C: ECT
Answer: C: ECT 
Explanation: None