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
[{'content': "Infant with blood in stools and mass in abdomen,diagnosis is – a) Intussusceptionb) Volvulusc) Idiopathic abdominal epilepsyd) Hirschsprung's disease \nSelect and explain. \nA. ac, B. a, C. ab, D. bc", 'role': 'user'}, {'content': "Answer: C \nExplanation: Causes of rectal bleeding in the infant\n\nAnal fissure\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0\xa0\nIntestinal duplication \xa0\xa0\nVolvulus\xa0\xa0\xa0\xa0\xa0\nIntussusception\nMeckel's diverticulum\nInfectious diarrhoea\xa0 \xa0 \xa0 \xa0\n\n\nOut of these diseases only intussception and volvulus present with an abdominal mass.\nIntussusception presents with sausage-shaped mass in the right hypochondrium.", 'role': 'assistant'}]