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: Unknown
[{'content': 'Sabin Feldman dye test is used for diagnosis of: \nSelect and explain. \nA. Leishmaniasis, B. Echinococcosis, C. Toxoplasmosis, D. Balantidiasis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ref. Textbook of Microbiology and Immunology BY Parija. Page. 500\n\xa0\nToxoplasma:\nTests include\n\nSabin-Feldman dye test, which tests for IgG antibodies\nELISAs targeted at IgM, IgA and IgE\nDifferential agglutination tests and IgG avidity tests.\n\nSabin Feldman Dye test\n\nThe test measures the total amount of antibody in serum which is capable of complement mediated killing of toxoplasma tachyzoites.\nSerum is diluted across a microtitre plate and the end point is the dilution at which 50% of the tachyzoites are dead', 'role': 'assistant'}]