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: Medicine
[{'content': 'Best test to evaluate syphilis after treatment is: \nSelect and explain. \nA. TPA, B. FTA-ABS, C. TPHA, D. VDRL', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]