The correct option is D Cholecystokinin - stimulates pancreatic enzyme secretions.
Cholecystokinin is a peptide hormone of the gastrointestinal system, responsible for stimulating the digestion of fat and protein. Cholecystokinin, previously called pancreozymin, is secreted in the duodenum and causes the release of digestive enzymes and bile from the pancreas and gallbladder, respectively.