Explanation:

- In the sets (16, 18, 20) and (17, 19, 21), each number is sequential and differs by +2 between each pair.

- Let's evaluate each option:

- Option 1: (64, 66, 68)

- The numbers are sequential and increase by 2, similar to the given pattern.

- Option 2: (24, 26, 30)

- The numbers increase by 2, but the last number does not follow the pattern, since it increases by 4.

- Option 3: (28, 30, 26)

- This set has inconsistent differences of +2 and -4.

- Option 4: (36, 40, 42)

- The numbers increase by 4 and then by 2, not following the consistent pattern.

- Correct Answer: Option 1 (64, 66, 68) follows the same pattern as the initial sets.