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': 'All are true regarding tear film except: \nSelect and explain. \nA. Consists of aqueous, lipid & mucus layer, B. Lipid layer is secreted by meibomian glands, C. Aqueous layer is formed by filtration from blood capillaries, D. Deficiency cause dry eye', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Aqueous layer is formed by filtration from blood capillaries', 'role': 'assistant'}]