This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Primary Angle-Closure Glaucoma, Subject name: Ophthalmology
[{'content': 'The patient presents with acute pain and redness of eye with diminished vision and vomiting. The finding shown is: \nSelect and explain. \nA. Mid-dilated pupil, B. Hypopyon, C. Dislocated eye lens, D. Dendritic ulcer', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Mid-dilated pupil.', 'role': 'assistant'}]