This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
Commonest manifestation of retinoblastoma is ? 
Select and explain. 
A. Pseudohypopyon, B. Leukocoria, C. Squint, D. Nystagmus
B: Leukocoria
Answer: B: Leukocoria 
Explanation: Ans. is 'b' i.e., Leukocoria 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.