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
Which of the following is an atypical antipsychotic? 
Select and explain. 
A. Clozapine, B. Chlorpromazine, C. Thioridazine, D. Haloperidol
A: Clozapine
Answer: A: Clozapine 
Explanation: (Ref: KD Tripathi, 7th ed. pg. 440-41)Classification of typical vs atypical antipsychoticsTypical/Classical antipsychoticsMOA: D2 receptor blocking* Phenothiazines: Chlorpromazine, Thioridazine, Trifluperazine, Fluphenazine, Perphenazine* Thioxanthenes: Flupenthixol, Zuclopenthixol, Thiothixene* Butyrophenones: Flaloperidol, Droperidol, Benperidol, DomperidoneAtypical AntipsychoticsMOA: 5HT2A , D4, D2, a blocking* Risperidone, Quetiapine, Aripiprazole, Clozapine, Olanzapine, Ziprasidone, Zotepine, Asenapine, Sertidole, Lurasidone