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.

**YOUR ANSWER IS RIGHT**