Least predilection for distal ileum -
Ans. is 'd' i.e., Zollinger-Ellison syndromeo Zollinger-Ellison syndrome (gastrinoma) does not usually occur in distal ileum,o Carcinoid syndrome, Meckel's diverticulum and crohn disease can affect distal ileum.
Carcinoid syndrome
Meckel's diverticulum
Crohn disease
Zollinger - Ellison syndrome
Small and Large Intestines