This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Intra Ocular Tumour, Subject name: Ophthalmology
[{'content': 'Commonest manifestation of retinoblastoma is - \nSelect and explain. \nA. Pseudohypopyon, B. Leukocoria, C. Squint, D. Nystagmus', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Leukocoria o Leukocoria or amauratic cat's eye reflex this is the most common manifestation. The leukocoria or the white glow in the pupil is caused by reflection of light from the white intraocular tumor.", 'role': 'assistant'}]