This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infection, Subject name: Medicine
[{'content': 'Toxoplasmosis in the foetus can be best confirmed by- \nSelect and explain. \nA. IgM antibodies against Toxoplasma in the mother, B. IgM antibodies against Toxoplasma in the foetus, C. IgG antibodies against Toxoplasma in the moter, D. IgG antibodies against Toxoplasma in the foetus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: IgM can be detected within the first 2 weeks of infection using the ISAGA or ELISA methods. .Women who are positive for IgG and negative for IgM are defined as immune and no fuher follow-up is necessary, because their fetuses are not at risk of congenital toxoplasmosis Ref Harrison20th edition pg 1312', 'role': 'assistant'}]