This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy, Subject name: Ophthalmology
[{'content': 'Avascular structure of the eye is - \nSelect and explain. \nA. Conjuctiva, B. Ciliary body, C. Cornea, D. Retina', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e. Cornea o Lens and cornea are avascular structures of eye, that's why fluorescein angiography can't be used to identify lesions.", 'role': 'assistant'}]