This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology and Rheumatology, Subject name: Medicine
[{'content': "A 25 years old female develops serous otitis media of left ear with cough and occasional hemoptysis and hematuria and epistaxis for one and half months her. Hemoglobin is 7 gm. B.P. > 170/100, proteinuria +++, RA positive (+ve) and ANCA positive (+ve), the likely cause is: \nSelect and explain. \nA. Wegener's granulomatosis, B. Rheumatoid arthritis, C. Rapidly proliferative glomerulonephritis, D. Good Pasteur's syndrome", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. A. Wegener's granulomatosisa. Any vasculitic lesion involving upper respiratory tract, lungs & kidney is characteristic of Wegner'sb. In this case, serous otitis media with hemoptysis, hematuria with C-ANCA positive is diagnostic of Wegner's", 'role': 'assistant'}]