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
Early sign of glaucoma includes following except; 
Select and explain. 
A. Nerve fibre atroiphy, B. Peripheral halo, C. Veical cup, D. Horizontal cup
D: Horizontal cup
Answer: D: Horizontal cup 
Explanation: D i.e. Horizontal cup Veically oval cup is seen in early glaucoma where as marked (total) bean pot cupping is seen in advanced glaucoma Q