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': 'Not true about retinoblastoma ? \nSelect and explain. \nA. Bilateral in 20-30%, B. Affects age group 1-5 years, C. More common in males, D. Leukocoria is earliest symptom', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' More common in males Retinoblastoma is the most common intraocular tumor in children. The tumor is confined to infancy and very young children (1-2 years). There is no sex predisposition. Retinoblastoma is unilateral in 70-75% of cases and bilateral in 25-30% of cases.", 'role': 'assistant'}]