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 diagosis of congenital syphilis - \nSelect and explain. \nA. FTA-ABS, B. TPHA, C. IgM-FTA ABS, D. TPI', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., IgM-FTA ABS", 'role': 'assistant'}]