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': 'All of the following are associated with Coombs-positive hemolytic anemia except - \nSelect and explain. \nA. Thrombotic thrombocytopenic purpura (TTP), B. Scleroderma, C. SLE, D. PAN', 'role': 'user'}, {'content': "Answer: A \nExplanation: Collagen vascular diseases associated with autoimmune hemolytic anemia (warm antibody type → Coomb's positive)\n\nCommon\xa0→\xa0SLE\nRare\xa0→ Rheumatoid arthritis, PAN, scleroderma, sjogren's syndrome", 'role': 'assistant'}]