A dip circle is adjusted so that its needle moves freely in the magnetic meridian. In this position, the angle of dip ia `40^(@)`. Now the dip circle is rotated so that the plane in which the needle moves makes an angle of `30^(@)` with the magnetic meridian. In this position the needle will dip by an angle
A. `40^(@)`
B. `30^(@)`
C. More than `40^(@)`
D. Less than `40^(@)`
