This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Pathology
About HUS all are true except - 
Select and explain. 
A. Most commonly caused by verocytotoxic Coli, B. Causes mild to severe coombs positive hemolytic anemia, C. Recurrences rare, D. Transient thrombocytopenia
B: Causes mild to severe coombs positive hemolytic anemia
Answer: B: Causes mild to severe coombs positive hemolytic anemia 
Explanation: Ans. (b) Causes mild to severe coombs positive hemolytic anemia(Ref: Robbins 9th/pg 942-943; 8th/pg 952-953)Typical HUS gives rise to coombs negative hemolytic anemia because autoantibodies are absent; HUS & TTP have been explained in detail in the chapter 12 on Bleeding disorders.