This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infectious disease, Subject name: Pediatrics
[{'content': 'The following statement is false regarding Congenital toxoplasmosis ? \nSelect and explain. \nA. Diagnosed by detection of IgM in cord blood, B. IgA is more sensitive than IgM for detection, C. Dye test is gold standard for IgG, D. Avidity testing must be done to differentiate between IgA & IgM', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The avidity test is helpful to know the time of infection. A high-avidity test result indicates that infection began >16 wk earlier ,which is especially useful in determining time of acquisition of infection in the 1st or final 16 wk of gestation. A low-avidity test result may be present for many months and is not diagnostic of recent acquisition of infection. Reference: Nelson textbook of pediatrics 21 st edition Page 1220', 'role': 'assistant'}]