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
Anti-neutrophil cytoplasmic antibodies (ANCA) is seen in 
Select and explain. 
A. Rheumatoid arthritis, B. Diabetes mellitus, C. Wegener’s Granulomatosis, D. Churg-Strauss syndrome
C: Wegener’s Granulomatosis
Answer: C: Wegener’s Granulomatosis 
Explanation: 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.