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.

52 : 221 :: 20 : ? :: 64 : 272

85

Logic here is :

2nd number = 1st number × 4 + (1st number ÷ 4 )

We have , 52 : 221

2nd number = 52 × 4 + (52 ÷ 4 ) = 208 + 13 = 221

&  64 : 272

2nd number = 64 × 4 + (64 ÷ 4 ) = 256 + 16 = 272

Similarly ,

20 : ?

2nd number = 20 × 4 + (20 ÷ 4 ) = 80 + 5 = 85

85 , is correct answer .