This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cornea and sclera, Subject name: Ophthalmology
[{'content': 'Avascular coat in eye is - \nSelect and explain. \nA. Sclera, B. Cornea, C. Retina, D. Choroid', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Cornea is a transparent,avascular,watch glass like structure.It forms anterior one sixth of the outer fibrous coat of eyeball. Reference:Comprehensive Opthalmology,AK Khurana,6th edition,pg no.95', 'role': 'assistant'}]