To what depth, relative to the surface does mercury dip down in a capillary tube of radius $1.0 mm$ surface tension $T=0.5 N/m$ density of mercury $=13.6 \times 10^{3}\;kg/m^3$ $\;g=9.8 m/s^2$

Question

\[\begin {array} {1 1} (a)\;+3.75\;mm \\ (b)\;-3.75\;mm \\ (c)\;2.22\;mm \\ (d)\;-2.22\;mm \end {array}\]