The mother of a one and a half year old child gives history of a white reflex from one eye for the past 1 month.

The mother of a one and a half year old child gives history of a white reflex from one eye for the past 1 month. On computed tomography scan of the orbit there is calcification seen within the globe. The most likely diagnosis is:
1 Congenital cataract.
2 Retinoblastoma.
3 Endophthalmitis.
4 Coats of disease.