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: Microbiology
[{'content': 'All of the following statements about Parvovirus B-19 are true except - \nSelect and explain. \nA. DNA virus, B. Crosses placenta in only < 10% of cases, C. Can cause severe anemia, D. Can cause aplastic crisis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]