Assertion `(A ) :` A buffer solution has a capacity to resist the change in pH value on addition is small amount of acid or base to it.
Reason `(R ) :` An aqueous solution of ammonium acetate can act as a buffer.
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