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': 'Which of the following is best used in the diagnosis of congenital syphilis – \nSelect and explain. \nA. FTA–ABS, B. TPHA, C. IgM–FTA ABS, D. TPI', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]