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': 'Infection with which of the following agents is particularly dangerous for anemic patients - \nSelect and explain. \nA. Adenovirus, B. Cytomegalovirus, C. Herpes simplex virus, D. Parvovirus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]