This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitreous and retina, Subject name: Ophthalmology
Umbrella configuration on fluorescein angiography is seen in 
Select and explain. 
A. Retinitis pigmentosa, B. Rhegmatous retinal detachment, C. Central serous retinopathy, D. Eale's disease
C: Central serous retinopathy
Answer: C: Central serous retinopathy 
Explanation: Fundus fluorescein angiography helps in confirming the diagnosis. Two patterns are seen:_ Ink-blot pattern: It consists of a small hyperfluorescent spot which gradually increases in size._ Smoke-stack pattern: It consists of a small hyperfluorescent spot which ascends veically like a smoke-stack and gradually spreads laterally to take a mushroom or umbrella configuration.Ref: Khurana; 4th edition; Pg.No. 272