Select the option that is related to the third number in the same way as the second number is related to the first number and the sixth number is related to the fifth number.

78 : 117 :: 90 : ? :: 108 : 162

135

78 : 117 :: 90 : ? :: 108 : 162

The logic followed here is :

Number × 6 : Number × 9

As

78 : 117

13 × 6 = 78

13 × 9 = 117

For 108 : 162

18  × 6 = 108

18  × 9 = 162

Similarly

90 : ?

15  × 6 = 90

15  × 9 = 135