This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diseases of orbit, Lids and lacrimal apparatus, Subject name: Ophthalmology
A 1 year old child having leucocoria was detected to be having a unilateral, large, retinoblastoma having the large globe. Current therapy would involve 
Select and explain. 
A. Enucleation, B. Chemotherapy followed by local dyes, C. Direct laser ablation using a photodynamic crytherapy, D. Scleral radiotherapy followed by chemotherapy
A: Enucleation
Answer: A: Enucleation 
Explanation: Conservative mode of treatment is indicated only in tumors of small size that is less than 6 mm in height Refer khurana 6/e p 303