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 5 mg%. The platelet count is 90000. Fragmented R.B.C 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: The clues in this question are -

History of diarrhoea        
Raised BUN and creatinine
Thrombocytopenia 
Fragmented RBCs in the peripheral smear  

All these suggest the diagnosis of HUS.