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
All of the following are associated with Coombs-positive hemolytic anemia except - 
Select and explain. 
A. Thrombotic thrombocytopenic purpura (TTP), B. Scleroderma, C. SLE, D. PAN
A: Thrombotic thrombocytopenic purpura (TTP)
Answer: A: Thrombotic thrombocytopenic purpura (TTP) 
Explanation: Collagen vascular diseases associated with autoimmune hemolytic anemia (warm antibody type → Coomb's positive)

Common → SLE
Rare → Rheumatoid arthritis, PAN, scleroderma, sjogren's syndrome