Gastro-intestinal hormone in the following is

Option 'A' Pepsin is a proteolytic enzyme in gastric juice. Option 'B' Ptyalin or amylase is an amylolytic (carbohydrate splitting) enzyme in saliva. Option 'D' Trypsin is a proteolytic enzyme in pancreatic juice. Cholecystokinin-Pancreozymin is a gastro-intestinal hormone that has actions on both pancreas and gall bladder.