<prompt> Least predilection for distal ileum ?Carcinoid syndromeMeckels diveiculumCrohn diseaseZollinger - Ellison syndrome  <response>: Ans. is d i.e., Zollinger-Ellison syndrome Zollinger-Ellison syndrome gastrinoma does not usually occur in distal ileum. Carcinoid syndrome, Meckels diveiculum and crohn disease can affect distal ileum. 