This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
Gland of Brunner's is found in: 
Select and explain. 
A. Jejunum, B. Duodenum, C. Ileum, D. All
B: Duodenum
Answer: B: Duodenum 
Explanation: Brunner glands (or Pancreal glands/duodenal glands) are compound tubular submucosal glands found in that poion of the duodenum which is above the hepatopancreatic sphincter.The main function of these glands is to produce a mucus-rich alkaline secretion (containing bicarbonate).