Gastrin is the correct answer because it is the only hormone in the list that is not produced by the pancreas.

Explanation:

- Gastrin: Gastrin is a hormone that is produced in the stomach lining. It plays a crucial role in the regulation of gastric acid secretion and stimulates the release of digestive enzymes. Gastrin is responsible for stimulating the production of gastric acid, which aids in the digestion of food in the stomach.

- Glucagon: Glucagon is a hormone that is produced by the alpha cells of the pancreas. It acts to increase blood glucose levels by stimulating the liver to convert stored glycogen into glucose and release it into the bloodstream. Glucagon is released in response to low blood glucose levels and works in opposition to insulin.

- Secretin: Secretin is a hormone that is produced by the S cells of the duodenum, which is the first part of the small intestine. It regulates the secretion of pancreatic enzymes and bicarbonate ions into the small intestine. Secretin is released in response to the presence of acidic chyme in the duodenum and helps to neutralize the acidity of the chyme.

- Ptyalin: Ptyalin, also known as salivary amylase, is an enzyme that is produced in the salivary glands. It plays a role in the digestion of carbohydrates by breaking down starches into smaller sugar molecules. Ptyalin begins the process of carbohydrate digestion in the mouth before the food reaches the stomach.

In conclusion, gastrin is the correct answer because it is the only hormone in the list that is not produced by the pancreas.

(d) is the enzyme found in the saliva