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
Diagnosis of toxoplasmosis in newborn is done by? 
Select and explain. 
A. IgG antibody against toxoplasma, B. IgM antibodies to toxoplasma, C. IgA antibodies to toxoplasma, D. IgE antibodies to toxoplasma
B: IgM antibodies to toxoplasma
Answer: B: IgM antibodies to toxoplasma 
Explanation: - The classical triad of congenital toxoplasmosis is intracranial calcification, hydrocephalus and chorioretinitis. - Diagnosis is confirmed by demonstrating a positive toxoplasma IgM in serum of the affected child. Reference : Ghai essential pediatrics, eighth edition, pg no:272