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: Surgery
In which of the following disease macula is most commonly involved: 
Select and explain. 
A. Sarcoidosis, B. Brucellosis, C. Toxoplasmosis, D. Leprosy
C: Toxoplasmosis
Answer: C: Toxoplasmosis 
Explanation: Toxoplasmosis is a protozoan infection derived from cats in the form of oocyst which affects both retina and choroid to form chorioretinitis. In infants the infection is transmitted placenta and the fundus examination demonstrates bilateral and frequently multiple chorio-retinal lesions. The macular area is paicularly involved. Such infants are acutely ill with a history of seizures and may develop hydrocephalus, areas of calcification in brain and 'mental retardation.