If \(R_E\) be the radius of Earth, then the ratio between the acceleration due to gravity at a depth ' \(r\) ' below and…

\(
1+\frac{r}{R_E}+\frac{r^2}{R_E^2}+\frac{r^3}{R_E^3}
\)

\(
1-\frac{r}{R_E}-\frac{r^2}{R_E^2}-\frac{r^3}{R_E^3}
\)

\(
1+\frac{r}{R_E}-\frac{r^2}{R_E^2}-\frac{r^3}{R_E^3}
\)

\(
1+\frac{r}{R_E}-\frac{r^2}{R_E^2}+\frac{r^3}{R_E^3}
\)