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: Pediatrics
[{'content': 'Which of the following does not establish a diagnosis of congenital CMV infection in a neonate ? \nSelect and explain. \nA. Urine culture of CMV, B. IgG CMV antibodies in blood, C. Intra-nuclear inclusion bodies in hepatocytes, D. CMV viral DNA in blood by polymerase chain reaction', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is `b\' i.e. IgG CMV antibodies in blood " Ig G antibody test is of little diagnostic value as positive results also reflects maternal antibodies."', 'role': 'assistant'}]