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: Ophthalmology
[{'content': 'Chorioretinitis in AIDS is caused by \nSelect and explain. \nA. Candida albicans, B. Herpes simplex, C. Toxoplasma, D. Cytomegalovirus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e.Cytomegalovirus', 'role': 'assistant'}]