This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lens, Subject name: Ophthalmology
[{'content': 'In which of the following condition frequent change of specatcles is seen \nSelect and explain. \nA. Morgagnian cataract, B. Incipient cataract, C. Primary open angle glaucoma, D. Presbyopia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Incipient cataract2 cheeky, confusing questions on the change of a wordFrequent change of glasses - cortical (incipient) or nuclear cataractFrequent change of presbyopic glasses - primary open angle glaucoma.', 'role': 'assistant'}]