This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cornea, Subject name: Ophthalmology
[{'content': 'Power of cornea is- \nSelect and explain. \nA. 30 D, B. 44 D, C. 55 D, D. 60 D', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is \'b\' i.e., 44 D "Out of + 60 D (total diopter power of eye), + 44 D is provided by the cornea."', 'role': 'assistant'}]