<prompt> Arterial supply of the duodenum is by -Superior mesenteric arteryCeliac arteryInferior mesenteric arteryBoth superior mesenteric celiac arteries  <response>: Upper part of duodenum up to opening of bile duct is derived from foregut and therefore is supplied by Coeliac trunk.Lower part of duodenum below the opening of bile duct is derived from midgut and is supplied by superior mesenteric artery. 