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
A 36 year old male with Cavitatory Lung lesions, Sinusitis, Ulcers in the mouth. RBC casts in the urine can be seen. Diagnosis is 
Select and explain. 
A. Granulomatosis with polyganitis, B. Eosinophilic with Polyangitis, C. IgA Vasculitis, D. Microscopic polyangitis
A: Granulomatosis with polyganitis
Answer: A: Granulomatosis with polyganitis 
Explanation: Wegener's also called Granulomatosis with polyangitis.