If \( n, e, \tau \) and \( m \) represent electron density, charge, relaxation time, and mass of...

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If \( n, e, \tau \) and \( m \) represent electron density, charge, relaxation time, and mass of an electron, respectively, the resistance of a wire of length \( l \) and cross-sectional area \( A \) is
(A) \( \frac{m l}{n e^{2} \tau A} \)
(B) \( \frac{2 m \tau A}{n e^{2} l} \)
(C) \( \frac{n e^{2} \tau}{2 m} \frac{A}{l} \)
(D) \( \frac{n e^{2} m}{2 \tau} \frac{l}{A} \)
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