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': "Rossette shaped cataract is seen in ? \nSelect and explain. \nA. Congenital rubella, B. Blunt trauma to eye, C. Wilson's disease, D. Diabetes mellitus", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Blunt trauma to eye", 'role': 'assistant'}]