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 66 year old presents to emergency with sudden onset severe pain, blurring vision in right eye. Examination reveals decreased visual acuity with shallow cornea, hazy cornea in the same eye.Eye has a stony hard consistency.Likely diagnosis is: 
Select and explain. 
A. Keratitis, B. Uveitis, C. Conjunctivitis, D. Glaucoma
D: Glaucoma
Answer: D: Glaucoma 
Explanation: Glaucoma