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': 'The major function of major intrinsic protein-26 (MIP-26) is: \nSelect and explain. \nA. Glucose transpo in lens, B. Transpo of water in lens, C. Diffusion barrier, D. Capsule of lens', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Transpo of water in lens', 'role': 'assistant'}]