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: Medicine
C-ANCA associated with - 
Select and explain. 
A. Wegener's granulomatosis, B. Microscopic polyangitis, C. Churg straws syndrome, D. PAN
A: Wegener's granulomatosis
Answer: A: Wegener's granulomatosis 
Explanation: None