<prompt> CXR of a patient is shown. What is the next investigation to be done in the patient?Ventilation perfusion scanBronchoalveolar lavageExploratory laparotomyHigh resolution CT scan  <response>: Ans. c Exploratory laparotomy.Image shows Chest X-ray with central trachea and increased bronchovascular markings. The Right lung shows clear presence of gas under diaphragm and needs an exploratory laparotomy. 