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: Unknown
A patient presents with respiratory symptoms i.e. cough, hemoptysis and glomerulonephritis. His C-ANCA levels in serum were found to be raised. The most likely diagnosis is – 
Select and explain. 
A. Goodpasteur’s syndrome, B. Classic polyarteritisnodosa, C. Wegener’s granulomatosis, D. Kawasaki syndrome
C: Wegener’s granulomatosis
Answer: C: Wegener’s granulomatosis 
Explanation: Renal and pulmonary symptoms with positive c-ANCA suggest the diagnosis of wegner’sglomerulonepritis
Clinical syndrome of wegner granulomatosis may be very similar to classical PAN or microscopic polyangitis.