Assertion (A) : Reduction in bicarbonate levels leads of dissolving of tooth enamel. Reason ("R") " : Bicarbonates in the saliva make the pH 5.4 to 7.4 . If the bicarbonates level in saliva is reduced the saliva becomes acidic and the tooth enamel may get dissolved .
What is pH scale ?
What is the role of mucus and bicarbonates present in the gastric juice?