Assertion (A ) `:` The degree of ionization of water is small at `25^(@)C` , only about one of every `10^(7)` molecules in pure water is ionized at any instant
Reason (R ) `:` In pure water at `25^(@)C ` the molar concentration of water is essentially constant.
A. Both A and R true and R is the correct explanation of A
B. Both A and R are true but R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true