<prompt> 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:Primary narrow angle glaucomaNormal tension glaucomaNeovascular glaucomaAbsolute glaucoma  <response>: Ans. Normal tension glaucoma 