This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
[{'content': 'All of the following statements are true about congenital rubella except - \nSelect and explain. \nA. It is diagnosed when the infant has IgM antibodies at bih, B. It is diagnosed when IgG antibodies persist for more than 6 months, C. M.C congenital defects a re deafness, cardiac malformation and cataract, D. Infection after 16 weeks of gestation results in major congenital defects', 'role': 'user'}, {'content': 'Answer: D \nExplanation: if rubella occurs in very early pregnancy the fetus may die. The congenital malformation is commonest during the first trimester (1st 12 wk) REF:ANANTHANARYANAN TEXTBOOK OF MICROBIOLOGY 9EDITION PGNO.555', 'role': 'assistant'}]