The correct answer is: A. Ascorbic acid.
Ascorbic acid, also known as vitamin C, is a water-soluble vitamin that is essential for human health. It is involved in many important bodily functions, including the production of collagen, the absorption of iron, and the maintenance of a healthy immune system. Vitamin C is also a powerful antioxidant, which means that it helps to protect cells from damage caused by free radicals.
Vitamin C deficiency can lead to a number of health problems, including scurvy, a condition characterized by fatigue, weakness, and bleeding gums. Vitamin C deficiency is rare in developed countries, but it can occur in people who have poor diets or who are malnourished.
Ascorbic acid is found in a variety of fruits and vegetables, including citrus fruits, tomatoes, broccoli, and Brussels sprouts. It is also available as a dietary supplement.
Riboflavin, niacin, and retinol are also important vitamins, but they are not known as the anti-sterile factor. Riboflavin is a water-soluble vitamin that is involved in energy production and the metabolism of carbohydrates, proteins, and fats. Niacin is a water-soluble vitamin that is involved in energy production, the metabolism of carbohydrates, proteins, and fats, and the synthesis of DNA and RNA. Retinol is a fat-soluble vitamin that is involved in vision, skin health, and the immune system.