When two conductors between each of radius r are at a distance D, the capacitance between the two is Proportional to
1
\(\log_e\left(\dfrac{D}{r}\right)\)
2
\(\log_e\left(\dfrac{r}{D}\right)\)
3
\(\dfrac{1}{\log_e\left(\dfrac{D}{r}\right)}\)
4
\(\dfrac{1}{\log_e\left(\dfrac{r}{D}\right)}\)