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
[{'content': "A patient presents with multiple pulmonary cavities hematuria and red cells casts. The most likely diagnosis is - \nSelect and explain. \nA. Anti GBM disease, B. Churg - Strauss allergic granulomatosis, C. Wegner's granulomatosis, D. Systemic lupus erthematous", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]