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': 'Scleritis is associated with some systemic disease including connective tissue disorder in: \nSelect and explain. \nA. 35% of cases, B. 50% of cases, C. 66% of cases, D. 85% of cases', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. 50% of cases', 'role': 'assistant'}]