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': 'Aqueous  humour contains the following to levels higher than that of plasma except \nSelect and explain. \nA. Lactate, B. Ascorbate, C. Proteins, D. Pyruvate', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Proteins levels of aqueous humour is lower than that of plasma.Rest have higher level in\xa0aqueous humour than plasma.', 'role': 'assistant'}]