If n, e, `tau`, m, are representing electron density charge, relaxation time and mass of an electron respectively then the resistance of wire of length 1 and cross sectional area A is given by

Options

A. `(ml)/(Ne^2atau)`
B. `(2mtauA)/(Ne^2l)`
C. `(Ne^2tauA)/(2ml)`
D. `(Ne^2A)/(2mtaul)`

Answer

A