According to the formula,

The average of 'n' multiples of a number =$\frac{\mathrm{Number}\times \left(\mathrm{n}+1\right)}{2}$

∴ n=100, number=2

∴ Required average =$\frac{2\times \left(100+1\right)}{2}=\frac{202}{2}=101$

Hence, Option A is correct.