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 teh following statements about parvovirus B-19 are true, except- \nSelect and explain. \nA. <10% spread by transplacental route, B. Respiratory route is the primary mode of transmission, C. It is a DNA virus, D. Affects erythroid progenitors', 'role': 'user'}, {'content': 'Answer: A \nExplanation: parvo virud is ssDNA virus.transmission is through respiratory route.genus is erythro virus REF:ANATHANARAYANAN MICROBIOLOGY NINTH EDITION PAGE.554', 'role': 'assistant'}]