The correct option is A 5.070
The zeroes at the end of a decimal number do not change the value of the number.
The zeroes before the whole number (on the left side) do not change the value of the number.
So,
5.7, 05.7 and 5.700 are the same as 5.7
But 5.070 is not the same as 5.7
Thus, 5.070 is the odd one out.