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: Pediatrics
An infant with history of diarrhoea 5 days back has urea 200 mg% and creatinine 5me/o. The platelet count is 90000. Fragmented RBC s are found in the peripheral smear. The most possible diagnosis ? 
Select and explain. 
A. HUS, B. TTP, C. ITP, D. Hemolytic anemia
A: HUS
Answer: A: HUS 
Explanation: Ans. is 'a' i.e., HUS The clues in this question are ? 1) History of diarrhea 3) Thrombocytopenia 2) Raised BUN and creatinine 4) Fragmented RBCs in peripheral smear All these suggest the diagnosis of HUS.