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

13 : 120 :: 17 : 152 :: 21 : ?

184

Logic :

First Number × 8 + 16 = Second Number

13 : 120 = 13 × 8 + 16 = 120

17 : 152 = 17 × 8 + 16 = 152

Similarly ,

21 : ? = 21 × 8 + 16 = 184

184 is correct answer .