Assertion (A) : Aqueous solution of ammonium carbonate is basic.
Reason (R) : Acidic/basic nature of a salt solution of a salt of weak acid and weak base depends on `K_(a) and K_(b)` value of the acid and the base forming it.
A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is not the correct explanation of A.
C. A is true but R is false.
D. Both A and R are false.