RRC DA Nutrition Practice Test

The correct answer involves calcium and phosphorus, which play a crucial role in maintaining oral health and reducing acidity in the mouth. Calcium is essential for the mineralization of teeth and helps in the overall structural integrity of enamel. It can also act as a buffering agent, mitigating the effects of acids that lead to tooth decay.

Phosphorus works alongside calcium in the formation of hydroxyapatite, a critical component of tooth enamel. This mineral helps to strengthen teeth and can also assist in neutralizing acids that result from bacterial metabolism in the mouth. By providing a favorable environment for enamel remineralization, calcium and phosphorus together can significantly reduce acidity levels, protecting teeth from demineralization and decay.

The other choices do not directly correlate with reduced acidity in the mouth. Sodium and iron, or potassium and magnesium, do not have the same established roles in dental health and acidity regulation as calcium and phosphorus do. This is why they do not form the basis for addressing acidity in oral health effectively.