In some region of space, gravitational field is given by $\frac{-\mathrm{C}}{\mathrm{r}}$ , r being the distance and C a constant. At a certain value of r = r₀, gravitational potential is V'. General expression of gravitational potential as a function of r is :

• A

  $\mathrm{Clog}\frac{{\mathrm{r}}_0}{\mathrm{r}}$

• B

  $\mathrm{Clog}\frac{{\mathrm{r}}_0}{\mathrm{r}}+{\mathrm{V}}^{\mathrm{\prime }}$

• C

  $\mathrm{Clog}\frac{\mathrm{r}}{{\mathrm{r}}_0}$

• D

  $\mathrm{Clog}\frac{\mathrm{r}}{{\mathrm{r}}_0}+{\mathrm{V}}^{\mathrm{\prime }}$