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
All of the following drugs are atypical antipsychotics EXCEPT ? 
Select and explain. 
A. Olanzapine, B. Clozapine, C. Risperidone, D. Thioridazine
D: Thioridazine
Answer: D: Thioridazine 
Explanation: None