<prompt> A boy presented in the OPD with minimal pleural effusion on the right side. The best method to detect this would be :Left side chest X-rayRight side chest X-rayRight lateral decubitus chest X-rayLeft lateral decubitus chest X-ray  <response>: Ans. is c is Right lateral decubitus chest X-ray Most dependent recess of the pleura is the posterior costophrenic angle.So in pleural effusion this recess would be filled earliest. But at least 100-200 ml of fluid would be required to fill this recess before it can be detected on a PA view.Therefore in cases of minimal pleural effusion the best method to detect it would be- Decubitus view with a horizontal beam. 