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': 'Test used for diagnosis of congenital syphilis: \nSelect and explain. \nA. IgMFTA, B. VDRL, C. TPI, D. Kahn flocculation test', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) IgMFTA', 'role': 'assistant'}]