This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Retina, Subject name: Ophthalmology
Which of the following group of drugs can cause Cystoid macular edema? 
Select and explain. 
A. Prostaglandin F2a analogue, B. Prostaglandin E2 analogues, C. Oral corticosteroids, D. a blockers
B: Prostaglandin E2 analogues
Answer: B: Prostaglandin E2 analogues 
Explanation: Ans. (b) Prostaglandin E2 analoguesRef: Becker-Shaffer Glaucoma 8/e, p. 400Drugs causing Cystoid macular edema* Benzylalkonium chloride* Timolol* Dinoprostone (PGE2 analogues)