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: Pediatrics
[{'content': 'Congenital syphilis can be best diagnosed by – \nSelect and explain. \nA. IgM FTA–ABS, B. IgG FTA–ABS, C. VDRL, D. T P I', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]