This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Pharmacology
Tardive dyskinesia is least commonly associated with which of the following drugs? 
Select and explain. 
A. Thioridazine, B. Metoclopromide, C. Thiothixene, D. Clozapine
D: Clozapine
Answer: D: Clozapine 
Explanation: Ans. is 'd' i.e., Clozapine * Clozapine is an atypical antipsychotic while others are typical traditional antipsychotic drugs; thus tardive dyskinesia is least commonly associated with clozapine, amongst the options given.