The correct option is C Intestinal juice
Chemical digestion of food is mediated by several enzymes secreted by the digestive glands.
The gastric glands in the stomach secrete gastric juice. The enzymes in gastric juice partially digest the proteins in the food. Along with chemical digestion, the churning movements of the stomach also help in the digestion of food. Food gets partially digested in the stomach and is called chyme.
The chyme enters the duodenum where it gets mixed with bile juice secreted by the liver, pancreatic juice secreted by the pancreas and intestinal juice secreted by the intestinal glands (crypts of Lieberkühn).
The intestinal juice is also called succus entericus. This juice contains a variety of enzymes like disaccharidases (e.g., maltase, sucrase, lactase), dipeptidases, lipases, nucleosidases, etc.