This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Pharmacology, Subject name: Pharmacology
[{'content': 'Sequence of clinical trials is \nSelect and explain. \nA. NDA -FDA-NDA, B. FDA--NDA-FDA, C. FDA-Marketing-NDA, D. FDA-NDA-Post marketing surveillance', 'role': 'user'}, {'content': 'Answer: D \nExplanation: (FDA-NDA-Post marketing survillance)', 'role': 'assistant'}]