A physical quantity of the dimensions of length that can be formed out of c, G and $$\frac{e^2}{4 \pi \epsilon_0}$$ is [c is velocity of light, G is universal constant of gravitation and e is charge]

A

$$\frac{1}{c^2} \left[\frac{e^2}{G4 \pi ε_0}\right]^{\frac{1}{2}}$$

B

$$\frac{1}{c} G \frac{e^2}{4 \pi ε_0}$$

C

$$\frac{1}{c^2} \left[G \frac{e^2}{4 \pi ε_0}\right]^{\frac{1}{2}}$$

D

$${c^2} \left[G \frac{e^2}{4 \pi ε_0}\right]^{\frac{1}{2}}$$