This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Medicine
[{'content': "A 28-year-old woman presents with a recent episode of coughing up some blood, frequent nosebleeds, and now decreased urine output. A nasal mucosa ulcer was seen on inspection. Her urinalysis is positive for protein and red cells consistent with a GN. The CXR shows two cavitary lesions and her serology is positive for antineutrophil cytoplasmic antibodies (ANCA). Which of the following is the most likely diagnosis? \nSelect and explain. \nA. Wegener's granulomatosis, B. bacterial endocarditis, C. Goodpasture's syndrome, D. lupus erythematosus", 'role': 'user'}, {'content': "Answer: A \nExplanation: Numerous diseases are associated with renal and pulmonary manifestations, including lupus, Goodpasture's syndrome, and Wegener's granulomatosis. Wegener's is typically associated with antineutrophil cytoplasmic antibodies.", 'role': 'assistant'}]