<prompt> Patient presented to the emergency department with severe abdominal pain - an erect radiograph was done. Based on the findings - the management should be:AIIMS 2018Gastric lavageICD insertionLaparotomyUSG FAST  <response>: Ans.C LaparotomyRadiograph shows free gas under diaphragm suggestive of Perforation - hence answer is Laparotomy. X-ray chest erect - is best radiographic projectionQ whereas CT scan is the most sensitiveQoverall Best investigationQ to identify pneumoperitoneum. 