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 configration on fluorescein angiogrphy 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: Central serous retinopathy is a retinal disorder characterised by serous retinal detachment in the macula affecting mostly young men ages 20-45 yrs. Fluorescein angiography shows two patterns- Ink blot pattern Smoke stack pattern - small hyperfluorescent spot which ascends veically like a smoke stack and gradually spreads laterally to take a mushroom or umbrella configuration. Ref : Khurana page no. 293 edition 6th