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
Feature of microscopic polyangitis is- 
Select and explain. 
A. IgG deposits in kidney, B. Bronchospasm, C. Renal involvement in 90% cases, D. All of the above
C: Renal involvement in 90% cases
Answer: C: Renal involvement in 90% cases 
Explanation: None