Select the option which 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. 37 : 58 :: 46 : ? :: 82 : 68

The logic followed here is as follows: The sum of the squares of the digits of the 1^st number gives the 2^nd number. Similar logic is followed for the 3^rd number, 4^th number and 5^th number, 6^th number). For 37 : 58 →  3² + 7² = 9 + 49 = 58 For 82 : 68 → 8² + 2² = 64 + 4 = 68 Similarly, for 46 : ? → 4² + 6² = 16 + 36 = 52 So, '52' 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.