A physical quantity of the dimensions of length that can be formed out of c, G and `(e^2)/( 4pi in_0)` is [ c is velocity of light, G is universal constant of gravitation and e is charge ]:

Options

A. `(1)/( c) G (e^2)/( 4pi in_0)`
B. `(1)/( c^2) [ G(e^2) /( 4pi in_0) ]^(1//2)`
C. `e^(2) [G (e^2)/( 4pi in_0) ]^(1//2)`
D. `(1)/( c^2) [ (e^2)/( G4pi in_0) ]^(1//2)`

Answer

B