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
[{'content': 'Drug which can act as antagonis of Haloperidole ? \nSelect and explain. \nA. Ropinirole, B. Clozapine, C. Imipramine, D. Pimozide', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is'a'i.e., Ropinirole Haloperidol is an antipsychotic, acts by > D2 receptor blockage.Ropinirole is an antiparkinsonian drug, acts by > D2 receptor agonist.", 'role': 'assistant'}]