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: Pathology
[{'content': 'A 36-year-old man is brought to the emergency department because of an episode of \nhemoptysis at home. This was the second episode of hemoptysis in several months. Urinalysis \nshows PBC casts and 1+ protein. An autoantibody screen is ordered. Immunofluorescence on \na kidney biopsy shows a linear pattern \nThe patient is most likely to test positive for which of the following? \nSelect and explain. \nA. Anti-CCP, B. Anti-GBM, C. Anti-Po, D. C-ANCA', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]