This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
[{'content': "A patient presents with symptoms of cough, hemoptysis, and glomerulonephritis. His C-ANCA levels in serum were found to be raised. The most likely diagnosis is \nSelect and explain. \nA. Goodpasteur's syndrome, B. Classic polyaeritis nodosa, C. Wegener's granulomatosis, D. Kawasaki syndrome", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Renal and pulmonary symptoms with positive c-ANCA suggest the diagnosis of Wegener&;s glomerulonephritis.The clinical syndrome of Wegner granulomatosis may be very similar to classical PAN or microscopic polyangiitis.', 'role': 'assistant'}]