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: Unknown
[{'content': 'True about retinoblastoma are all except : \nSelect and explain. \nA. AD, B. Most common intraocular tumor of childhood, C. Females are more affected than males, D. Bilateral involvement not rare', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Retinoblastoma\nIncidence:\xa0 It is the most common intraocular tumor of childhood occurring 1 in 20,000 live births.\nAge : though congenital, it is not recognized at birth, and is usually seen between 1 and 2 years of age.\nSex : There is no sex predisposition.\nRace : it is rarer in Negroes than whites.\nBilaterality : In 25-30% cases, there is bilateral involvement, although one eye is affected more extensively and earlier than the other.', 'role': 'assistant'}]