Question

please answer me what is brunner's gland ? and where it is found?

Answer 1

 any of the compound racemose glands in the submucous layer of the duodenum that secrete alkaline mucus and a potent proteolytic enzyme — called also duodenalgland, gland of Brunner.

it is located in a section of duodenum

Answer 2

Brunner's glands (or duodenal glands) are compound tubular submucosal glands found in that portion of the duodenum which is above the hepato pancreatic sphincter (a.k.a. sphincter of Oddi). The main function of these glands is to produce a mucus-rich alkaline secretion i.e. Mucous (containing bicarbonate)