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

9 : 45 :: ? : 50 :: 32 : 68

14

The logic followed here is:

Second number - 36 = First number

⇒ 9 : 45 → 45 - 36 = 9

⇒ 32 : 68 → 68 - 36 = 32

Similarly,

⇒ ? : 50 → 50 - 36 = 14

Hence, "14" is the correct answer.