<prompt> Barium swallow is used for-ColonEsophagusDuodenumJejunum  <response>: Ans. is b i.e., EsophagusBarium investigationUsed to visualizeBarium swallowMainly for esophagusBarium mealEsophagus, stomach, duodenumBarium follow throughSmall intestine jejunum and ileumBarium enemaLarge intestine colon rectum 