pH of saliva is

Select the correct word from the words in bracket The pH of blood is around 7.4, of saliva is 6.5 and of acid rain is around 4.5. The solution which is slightly alkaline of the three. [saliva / acid rain / blood]

In man pH of saliva varies from:

Explain the role of saliva in digestion.

Ptyalin of saliva acts in

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 .