The Logic follows here: (Number)2:(Number−2)2 Both the numbers should be a prime number. 132=169 (13−2)=112=121 Similarly, 72=49 (7−2)2=52=25 Hence, "49 : 25" is the correct answer. NOTE: All other options are following logic (Number)2:(Number−2)2 but they both the numbers are not prime