Assertion (A): $(45 \times 46) \bmod 9 = 0$.

Reason (R): 45 is a multiple of 9.

Explanation

1. 01

   $45 \equiv 0 \pmod{9}$, so $45 \times 46 \equiv 0 \times 46 = 0$.

2. 02

   Both are true, and R is exactly why the product leaves no remainder.