Question

crohns disease affects the:
a stomach.
b duodenum.
c ileum.
d common bile duct.

Explanation:

Crohn's disease is an inflammatory bowel disease. While it can affect any part of the gastrointestinal tract from the mouth to the anus, the ileum (the last part of the small intestine) is a commonly affected site. The stomach (A) is less commonly the main site of Crohn's compared to the ileum. The duodenum (B) (the first part of the small intestine) can be affected but not as typically as the ileum. The common bile duct (D) is not a typical site of Crohn's disease which primarily targets the gastrointestinal mucosa.

Answer:

C. Ileum