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': 'Fexofenadine is metabolic product of : \nSelect and explain. \nA. Loratidine, B. Astemizole, C. Cetrizine, D. Terfenadine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]