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 75-year old patient present with deterioration of vision. On examination the pupillary reflex is observed to be sluggish and the intraocular pressure is normal. Optic disc evaluation shows a large and deep cup and primarily shows paracentral scotomas. The most likely diagnosis is: 
Select and explain. 
A. Primary narrow angle glaucoma, B. Normal tension glaucoma, C. Neovascular glaucoma, D. Absolute glaucoma
B: Normal tension glaucoma
Answer: B: Normal tension glaucoma 
Explanation: Ans. Normal tension glaucoma