A physical quantity of the dimensions of length that can be formed out of c, G and
e²/4πε0is
is [c the velocity of light, G is the universal constant of gravitation and e is the charge]
A. 1/cG e²/4πε0
B. 1/c² [Ge²/4πε0]¹/²
C. c² [Ge²/4πε0]¹/²
D. 1/c² [e²/G4πε0]¹/²
