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

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