Which of the following juices contains the enzyme ptyalin?

The juice that contains the enzyme ptyalin is saliva. Ptyalin, also known as salivary amylase, is an enzyme that breaks down carbohydrates in the mouth. When you chew your food, your saliva glands produce saliva that contains ptyalin, which begins the process of breaking down carbohydrates into simpler sugars that can be absorbed by the body. This is why it's important to chew your food thoroughly, to allow the ptyalin in saliva to work effectively. The other juices listed, such as gastric juice, pancreatic juice, and succus, do not contain ptyalin and have different functions in the digestive process.