This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Glaucoma, Subject name: Ophthalmology
[{'content': 'A 75 year old patient presents 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 paracentral scotomas. The most likely diagnosis is: \nSelect and explain. \nA. Primary Narrow angle glaucoma, B. Normal Tension Glaucoma, C. Neovascular Glaucoma, D. Absolute Glaucoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Normal Tension GlaucomaRef: Kanski 7/e, p. 346; Yanoff 3/e, p. 1159Glaucomatous cupping (large and deep cup) along with glaucomatous visual field defects (paracentral scotomas are the most frequent) in patients with normal intraocular pressure suggests a diagnosis of Normal Tension Glaucoma (NTG).', 'role': 'assistant'}]