A body starts from rest and moves with a constant acceleration. The ratio of distance covered in the nth second to the distance covered in n second is

• A

  $\frac{2}{\mathrm{n}}-\frac{1}{{\mathrm{n}}^2}$

• B

  $\frac{1}{{\mathrm{n}}^2}-\frac{1}{\mathrm{n}}$

• C

  $\frac{2}{{\mathrm{n}}^2}-\frac{1}{\mathrm{n}}$

• D

  $\frac{2}{\mathrm{n}}+\frac{1}{{\mathrm{n}}^2}$