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: Pathology
[{'content': 'Anti-neutrophil cytoplasmic antibodies (ANCA) is seen in \nSelect and explain. \nA. Rheumatoid arthritis, B. Diabetes mellitus, C. Wegener’s Granulomatosis, D. Churg-Strauss syndrome', 'role': 'user'}, {'content': 'Answer: C \nExplanation: PR3-ANCAs are also present in up to 95% of cases; they are a useful marker of disease activity and may participate in Wegener’s granulomatosis.', 'role': 'assistant'}]