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': 'The following is not true of syphilis - \nSelect and explain. \nA. TPI is most specific, B. VDRL is not specific, C. VDRL is negative in secondary syphilis, D. IgM test is specific for congenital syphilis', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., VDRL is negative in secondary syphilis", 'role': 'assistant'}]