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
A 70–year–old man presents with deterioration of vision 3 weeks after cataract extraction and IOL implantation. Slit lamp examination shows honeycomb maculopathy and Fluorescein angiography (FA) shows 'flower petal' hyperfluorescence. The most likely diagnosis is – 
Select and explain. 
A. Age related macular degeneration (ARMD), B. Central serous Retinopathy (CSR), C. Macular Dystrophy, D. Cystoid Macular Edema
D: Cystoid Macular Edema
Answer: D: Cystoid Macular Edema 
Explanation: Unexpected visual loss, 3 weeks after cataract surgery with 'honey comb maculopathy' and 'flower petal' hyperfluorescence on Fluorescin Angiography is characteristic of Cystoid macular Edema.