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
[{'content': 'An infant present with bilateral white pupillary reflex. On slit lamp examination a zone of opacity is observed around the fetal nucleus with spoke like radial opacities. The most likely diagnosis is: \nSelect and explain. \nA. Cataracto Centralis Pulverulenta, B. Lamellar cataract, C. Coronary cataract, D. Posterior polar cataract', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Lamellar cataract', 'role': 'assistant'}]