This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen & Pelvis, Subject name: Anatomy
Brunner glands are seen in: 
Select and explain. 
A. Duodenum, B. Esophagus, C. Cardia of stomach, D. Small intestine
A: Duodenum
Answer: A: Duodenum 
Explanation: Ans. A DuodenumRef: BDC, 5th ed. Vol II pg. 268* Brunner's gland is found in duodenum above sphincter of oddi.* Main function of these glands is to produce mucus rich alkaline secretion which protects duodenum from gastric acidic contents.* It also facilitates activation of intestinal enzymes which helps in absorption.