The correct option is A True
Deviation is the number by which the given number exceeds the base or is less than the base.
But if the given number is treated as the base, then deviation will be zero.
For example: Take number 25.
If we take base 10, then the deviation is 25 – 10 = 15.
If we take base 30, then the deviation is 25 – 30 = -5.
If we take base as 25, then the deviation is 25 – 25 = 0.
So, the given statement is correct