In the number ‘39748926’, how many pairs of the digits have the same number between them (both forward and backward direction) in the number series?

Correct option is C

The valid pair- 8-9
In the number 3 9 7 4 8 9 2 6, 0 digit between them.
In numerical sequence also 0 digit between 8 and 9.
therefore, only 8-9 is the valid pair ( in forward)