Explanation:

- We need to find pairs with a number of digits between them matching their numerical difference.

- 8 and 9: One number between (6), matches difference (9-8=1).

- 9 and 6: Two numbers between (5 and 2), matches difference (9-6=3).

- 6 and 5: No numbers match the difference (6-5=1).

- 5 and 2: One number between (4) but difference is 3 (5-2=3, does not match).

- 9 and 2: Three numbers between (6, 5, 4) matches difference (9-2=7, does not match).

- Count 2 matching pairs (8, 9) and (9, 6).

Correct Answer is Option: 2—Two

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