Answer: It becomes inactivated
Step-by-step explanation:
Since enzymes are proteinous in nature, they perform best at a particular physiological temperature, pH and location.
So, once pepsin gets transferred to duodenum (where trypsin) is located, it becomes inactivated because it functions best in the acidic medium of gastric gland, whereas pancreas has an alkaline medium.
Thus, alkaline pH of the duodenum will coagulate and inactivate pepsin.