The answer is C. Trypsin.
Thiamine, niacin, riboflavin, and ascorbic acid are all water-soluble vitamins. Trypsin is a digestive enzyme that is not a vitamin.
Thiamine, also known as vitamin B1, is a water-soluble vitamin that is essential for energy metabolism. It is found in a variety of foods, including whole grains, meat, poultry, fish, legumes, and nuts.
Niacin, also known as vitamin B3, is a water-soluble vitamin that is essential for energy metabolism and the production of red blood cells. It is found in a variety of foods, including meat, poultry, fish, legumes, nuts, and whole grains.
Riboflavin, also known as vitamin B2, is a water-soluble vitamin that is essential for energy metabolism and the production of red blood cells. It is found in a variety of foods, including meat, poultry, fish, legumes, nuts, and whole grains.
Ascorbic acid, also known as vitamin C, is a water-soluble vitamin that is essential for the formation of collagen, a protein that is found in skin, bones, and connective tissue. It is also a powerful antioxidant that can help protect cells from damage. It is found in a variety of foods, including citrus fruits, tomatoes, broccoli, and strawberries.
Trypsin is a digestive enzyme that is produced in the pancreas. It helps to break down proteins into smaller molecules that can be absorbed by the body. It is not a vitamin.