5 year old child presents with reduces urine output since 1 day and petechial spots all over the body, there was history of diarrhea 2 weeks brier to this. Blood investigation showed Hb - 7gm / dl, TLC - 11,000 / MM3. PLATELET COUNT  - 20.000/ mm3, peripheral smear of this child is given below. what is the most probable diagnosis?
Peripheral smear shows schistocytes. there is reduced platelet count, petechial spots over body, history of diarrhea was 2 days prior to oliguria. All these points towards hemolytic uremic syndrome.
Malaria
Idiopathic thrombocytopenic purpura
Acute tubular necrosis
Hemolytic uremic syndrome