This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Uveal Tract, Subject name: Ophthalmology
Which of the following protozoan affects the eye? 
Select and explain. 
A. E. histolytica, B. E. coli, C. Giardia lambia, D. Toxoplasma
D: Toxoplasma
Answer: D: Toxoplasma 
Explanation: Ans. (d) ToxoplasmaRef: Yanoff 3/e, Chapter 7.12 Ocular; Toxoplasmosis; Harrison 18/e, p. 1724Toxoplasmosis is the most common cause of posterior uveitis and accounts for approximately 90% of focal necrotizing retinitis.