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': 'Leucokoria can be seen in all except - \nSelect and explain. \nA. Persistant hyperplastic primary vitreous, B. Congenital glaucoma, C. Fungal endopthalmitis, D. Retinoblastoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Persistant hyperplastic primary vitreous,Fungal endopthalmitis,Retinoblastoma ,coloboma of choroid, exudative retinopathy of coats and retinopathy of prematurity. Ref: ak khurana 6th edition', 'role': 'assistant'}]