This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
[{'content': 'WHICH OF THE FOLLOWING IS NOT A PROKINETIC DRUG? \nSelect and explain. \nA. 5HT4 ANTAGONIST, B. D2 BLOCKERS, C. MACROLIDES, D. DIPHENOXYMETHANE', 'role': 'user'}, {'content': 'Answer: D \nExplanation: REF : KD TRIPATHI 8TH ED', 'role': 'assistant'}]