This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Tumors, Subject name: Ophthalmology
[{'content': 'Most common presenting feature of retinoblastoma - \nSelect and explain. \nA. White reflex, B. Proptosis, C. Photophobia, D. Pain', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Amaurotic cats eye appearence(60%) Ref : ak khurana 6th edition', 'role': 'assistant'}]