<prompt> During cardiopulmonary resuscitation, external cardiac compression is given overUpper third of sternumMid third of sternumLower third of sternumPrecordium overall  <response>: Ans. c Lower third of sternum Ref. Short text book of Anaesthesia, 2nd ed196External cardiac massage InfantsChildrenAdultsPulse checkBrachial femoralCarotidCarotid femoralCompression areaMidsternumMidsternumLower 13 rd of sternumCompression with2-3 fingers or by thumbs while chest in encircled by both handsHeel of one handBoth hands, one palm over other and hand should be extended at elbowCompression depth 12 -1 inch1- 12 inch1 12 inchRate100min100min100minRatio of cardiac compression to breathing5:15:130:2UK Resuscitation Council Adult Life Support ALS Alorithm -2010 