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': 'With accommodation at rest, total refractory power of crystalline lens is \nSelect and explain. \nA. 14D, B. 16D, C. 18D, D. 20D', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. 16DThe diopteric power of reduced eye is + 6OD, of which + 44D is contributed by cornea and + 16D by the crystalline lens.', 'role': 'assistant'}]