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 fourth number is related to third number.

23 : 25 :: 17 : 64 :: 29 : ?

121

23 : 25 :: 17 : 64 :: 29 : ?

The logic followed here is :

23 ⇒( 2 + 3) = 5 ⇒ 5² = 25

17 ⇒( 1 + 7) = 8 ⇒ 8² = 64

same as

29 ⇒( 2 + 9) =11 ⇒ 11² = 121