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: Microbiology
[{'content': 'Diagnostic test of choice for neurosyphilis is ? \nSelect and explain. \nA. VDRL, B. TA-ABS, C. TPI, D. RPR', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., VDRL", 'role': 'assistant'}]