At a certain place, the horizontal component of earth's magnetic field is \[\sqrt{3}\]times the vertical component. The angle of dip at that place is [MP PMT 1984, 85; AFMC 2000]

• A.            \[60{}^\circ \]                      
• B.            \[45{}^\circ \]
• C.            \[90{}^\circ \]                      
• D.            \[\begin{align}   & 2rH \\  & {{\mu }_{0}}N \\ \end{align}\]