Select the option that is related to the third number in the same way as the second number is related to the first number.
53: 636 :: 51: ?
The logic followed here is as follows: First number X (Sum of digits of first number) = Second number. For 53 : 636 →53  X (4 + 8) = 53 X 12 = 636 For 51: ? → 51 X (5 + 1) = 51 X 6 = 306
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