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
True about retinoblastoma are all except : 
Select and explain. 
A. AD, B. Most common intraocular tumor of childhood, C. Females are more affected than males, D. Bilateral involvement not rare
C: Females are more affected than males
Answer: C: Females are more affected than males 
Explanation: Retinoblastoma
Incidence:  It is the most common intraocular tumor of childhood occurring 1 in 20,000 live births.
Age : though congenital, it is not recognized at birth, and is usually seen between 1 and 2 years of age.
Sex : There is no sex predisposition.
Race : it is rarer in Negroes than whites.
Bilaterality : In 25-30% cases, there is bilateral involvement, although one eye is affected more extensively and earlier than the other.