This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lens, Subject name: Ophthalmology
[{'content': 'Rubella cataract is seen as- \nSelect and explain. \nA. Posterior polar cataract, B. Nuclear cataract, C. Blue dot cataract in young, D. Cuneiform cataract', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. (b) Nuclear cataractRef: Parson's 21/e, p. 266Congenital rubella infection can cause congenital nuclear cataract and congenital total cataract.Sometimes it may also cause lamellar (zonular) cataract (Occurs in fetal nucleus. Thus a type of congenital nuclear cataract)", 'role': 'assistant'}]