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
Antipsychotic drug with least extrapyramidal effects is : 
Select and explain. 
A. Clozapine, B. Risperidone, C. Thioridazine, D. Chlorpromazine
A: Clozapine
Answer: A: Clozapine 
Explanation: A i.e. Clozapine