This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen and pelvis, Subject name: Anatomy
Brunner&;s glands are present in 
Select and explain. 
A. Esophagus, B. Stomach, C. Duodenum, D. Ileum
C: Duodenum
Answer: C: Duodenum 
Explanation: Submucosal glands of duodenum are Brunner's glands, they are mucus, bicarbonate-secreting glands. This helps in protecting duodenal epithelium from acidic secretions of the stomach.