This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immune system, Subject name: Medicine
[{'content': 'All are true about Sjogren syndrome except \nSelect and explain. \nA. Interstitial nephritis, B. Subcutaneous fibrosis, C. Lack of tear, D. Xerostomia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref - Davidsons 23e p1039', 'role': 'assistant'}]