Select the set in which the numbers are related in the same way as are the numbers of the following sets.

(15, 135, 6) (12, 84, 5)

(21, 315, 6)

(15, 135, 6) (12, 84, 5)

For the first set:

=> 135 ÷ 15 = 9

 9 - 3 = 6

For the second set:

=> 84 ÷ 12 = 7

 7 - 2 = 5

So,

Option 01 (21, 315, 6);

315 ÷ 21 = 15

6 = 15 - 9

This set follows the pattern.

Option 02 (9, 89, 3);

89 ÷ 9 = 9.888...

 9 - 3 = 6 not 3

This set doesn't follow the pattern.

Thus, (21, 315, 6) is correct.