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': 'Macula involvement is common in -a) Toxoplasmab) Malariac) CMVd) Syphilis \nSelect and explain. \nA. abc, B. acd, C. bc, D. bde', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Macula lies at posterior pole of retina. All the causes of retinitis / chorioretinitis can involve the macula. The common causes are HIV/AIDS, syphilis, Toxoplasmosis, tuberculosis, CMV, sarcoidosis.', 'role': 'assistant'}]