Explanation:

To find the least common multiple (LCM), you look for the smallest number that both numbers divide into without remainder.

- Find the prime factors:

- 28: $2^2\times 7$

- 92: $2^2\times 23$

- Combine prime factors (take the highest power of each):

- LCM: $2^2\times 7\times 23=644$

- Option 1: 464 is not divisible by 28.

- Option 2: 644 divides both 28 and 92 without a remainder.

- Option 3: 161 is too small and not divisible by either.

- Option 4: 322 is not divisible by 28.