This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Retina, Subject name: Ophthalmology
[{'content': 'What is the indication of using indocyanine green angiography? \nSelect and explain. \nA. Occult choroidal neovascularisation, B. Conjunctivitis, C. Vitreous hemorrhage, D. Corneal ulcer', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Occult choroidal neovascularisationRef: Kanski 5/e, Ch 14As opposed to fluorescein, indocyanine green is a larger molecule that binds completely to plasma proteins, causing it to remain in the choroidal vessels.', 'role': 'assistant'}]