This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Tumors, Subject name: Ophthalmology
Ideal treatment of B/L retinoblastoma- 
Select and explain. 
A. Enucleation, B. Radiation, C. Chemotherapy, D. Cyclophotocoagulation
B: Radiation
Answer: B: Radiation 
Explanation: *Chemotherapy is now the first line of treatment of choice in most cases of bilateral retinoblastoma. Ref: Wills Eye Hospital at las of Clinical ophthalmology p.269.