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
Following are seen in CRA occlusion except: 
Select and explain. 
A. Gradual loss of vision, B. Headache, C. Sudden loss of vision, D. Retained central vision
A: Gradual loss of vision
Answer: A: Gradual loss of vision 
Explanation: A i.e. Gradual loss of vision