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
All are seen in CMV retinitis except 
Select and explain. 
A. Immunosuppresion, B. Brush-fire appearance Pattern, C. Crack mud appearance, D. Perivasculitis
C: Crack mud appearance
Answer: C: Crack mud appearance 
Explanation: Answer- C. Crack mud appearanceCMV retinitis is the most common ophthalmic manifestation of CMV.There is characteristic hemorrhagic, full thickness retinitis.Occuring as a congenital infection in infants or an oppounistic infection in the immunocompromised host.CMV retinitis is a white granular geographic lesion that clears centrally as it enlarges, leaving a quiet central area of retinal atrophy and mottled pigment epithelium. This has also been described as "brush-fire pattern.Perivascular retinitis- Frosted branch angitis with retinal perivasculitis.