Equivalent resistance between the adjacent corners of a regular $n$-sided polygon of uniform wire of resistance $R$ would be :\\
(1) $\frac { ( n - 1 ) R } { n ^ { 2 } }$\\
(2) $\frac { ( n - 1 ) R } { ( 2 n - 1 ) }$\\
(3) $\frac { n ^ { 2 } R } { n - 1 }$\\
(4) $\frac { ( n - 1 ) R } { n }$