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
Kusumlata presents with acute painfull red eye and mild dilated veically oval pupil. Most likely diagnosis is: 
Select and explain. 
A. Acute retrobulber neuritis, B. Acute angle closure glaucoma, C. Acute anterior uveitis, D. Severe kerato-conjunctivitis
B: Acute angle closure glaucoma
Answer: B: Acute angle closure glaucoma 
Explanation: B i.e. Acute angle closure glaucoma