The correct option is D All of these
The deviation is the number by which the given number exceeds the base or is less than the base.
When we take 640 as base, the deviation is 642 – 640 = 2
When we take 630 as base, the deviation is 642 – 630 = 12
So, when we take 600 as base, the deviation is 642 – 600 = 42
Hence, option D is correct.