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: Pharmacology
Which of the following is not an antidepressant? 
Select and explain. 
A. Amitriptyline, B. Fluoxetine, C. Imipramine, D. Chlorpromazine
D: Chlorpromazine
Answer: D: Chlorpromazine 
Explanation: None