Pulverised coal passing through $200$ mesh screen has a diameter of $0\mathrm{.}074$ mm $(74$ micron$).$ The same passing through $50$ mesh screen will have a dia of $\_\_\_\_\_\_\_\_\_$ mm$.$

$0\mathrm{.}007$

$0\mathrm{.}3$

$50$

$0\mathrm{.}014$