Two $10$ cm long wires are parallel and separated by $4$ cm $.$ Both wires carry a current of $15$

A$.$ The force between the two wires is:

$1\mathrm{.}125{10}^{-4}N$

$1\mathrm{.}125{10}^{-3}\frac{N}{m}$

$1\mathrm{.}125{10}^{-5}N$

$1\mathrm{.}125{10}^{-5}\frac{N}{m}$