This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gastrointestinal tract, Subject name: Pediatrics
[{'content': "A 5 year old child with gas under diaphragm is seen in ? \nSelect and explain. \nA. Enteric fever with intestinal perforation, B. Chilaiditi's syndrome, C. Iatrogenic pneumoperitoneum, D. All of the above", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Pneumoperitoneum:free air under the diaphram on an upright chest film suggests the presence of a bowel perforation and underlying peritonits. Enteric fever with intestinal perforation:seen in 1-3 %cases,occur in 3rd- 4th week of illness due to hyperplasia,ulceration and necrosis at the ileocecal peyer&;s patches at the initial site of salmonella infiltration. Ref : HARRISON&;S PRINCIPLES OF INTERNAL MEDICINE,18 TH EDITION(pg no:2692)', 'role': 'assistant'}]