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
[{'content': 'All of the following anatomical changes will predispose to primary-angle-closure glaucoma except: \nSelect and explain. \nA. Small cornea, B. Flat cornea, C. Anterior chamber shallow, D. Sho axial length of eyeball', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Flat cornea', 'role': 'assistant'}]