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
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 
Select and explain. 
A. acd, B. bde, C. ace, D. ade
C: ace
Answer: C: ace 
Explanation: Leukocoria (amaurotic cat's eye appearance) is the commonest feature of retinoblastoma.
70-75% of retinoblastoma are unilateral and 25-30% are bilateral.
Hereditary retinoblastoma may have positive family history.
Various treatment options are available (not only enucleation).
Most common age group is 1-2 years.