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: Anatomy
[{'content': 'Memory T cell can be identified using the following marker \nSelect and explain. \nA. CD45RA, B. CD45RB, C. CD45RC, D. CD45RO', 'role': 'user'}, {'content': 'Answer: D \nExplanation: .', 'role': 'assistant'}]