The correct answer is C. Rennin.
Rennin is an enzyme that helps to digest milk protein. It is produced in the stomach of calves and other ruminant animals. Rennin helps to break down the milk protein casein into smaller peptides and amino acids. This makes it easier for the calf to digest the milk.
Pepsin is an enzyme that helps to digest protein in the stomach. It is produced in the stomach of humans and other mammals. Pepsin helps to break down the protein into smaller peptides.
Trypsin is an enzyme that helps to digest protein in the small intestine. It is produced in the pancreas. Trypsin helps to break down the protein into smaller peptides and amino acids.
Eripsin is not an enzyme. It is a misspelling of the word “erepsin”. Erepsin is an enzyme that helps to digest protein in the small intestine. It is produced in the pancreas. Erepsin helps to break down the protein into smaller peptides and amino acids.