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': 'True about Retinoblastoma –a) Leukocoria is most common presentationb) Always unilateralc) May have family historyd) Enucleation is the only treatmente) Most common age group affected is 1–2 year \nSelect and explain. \nA. acd, B. bde, C. ace, D. ade', 'role': 'user'}, {'content': "Answer: C \nExplanation: Leukocoria (amaurotic cat's eye appearance) is the commonest feature of retinoblastoma.\n70-75% of retinoblastoma are unilateral and 25-30% are bilateral.\nHereditary retinoblastoma may have positive family history.\nVarious treatment options are available (not only enucleation).\nMost common age group is 1-2 years.", 'role': 'assistant'}]