<prompt> On Contrast radiography which among thefollowing is false?Ileum is featurelessColon has haustrationsJejunum is featheryDistal pa of duodenum has a cap  <response>: Distal pa of duodenum has a capThe first pa of the duodenum has the duodenal cap or bulb and not the distal pa.The first pa of the duodenum is visible as a triangular shadow on barium studies and is ka duodenal cap.The small intestine contains mucosal folds known as plicae circulares or valvulae conniventes that are visible on barium studies and help in the distinction between small intestine and colon. Colon instead can be identified by presence of haustrations.Valvulae conniventes are more prominent in the jejunum giving the feathery appearance on barium. These mucosal folds are gradually reduced distally giving a featureless appearance of distal ileum. 