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
[{'content': 'Retinoblastoma is associated with: \nSelect and explain. \nA. Intracranial calcification, B. Intra orbital calcification, C. Optic canal widening, D. Hydrocephalus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans: b (Intra orbital calcification) Ref: Khurana, 4th ed,p.Intra orbital calcification is a feature of endophytic retinoblastoma. Presents as multiple growths projecting into the vitreous giving rise to cottage cheese appearance.Ophthalmoscopic appearance of retinoblastoma.Endophytic growth - Well circumscribed polypoid mass into vitreousCalcification present, haemorrhage + / -Exophytic growth - Grows outwards, separating retina from choroidsO/E exudative retinal detachment', 'role': 'assistant'}]