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
Which of the following is not an ophthalmic emergency: 
Select and explain. 
A. Macular hole, B. Retinal Detachment, C. CRAO, D. Acute primary angle closure glaucoma
A: Macular hole
Answer: A: Macular hole 
Explanation: Ans. Macular hole