Correct option is B
True Bearing
The horizontal angle between the true meridian and a survey line, measured clockwise.
Usually expressed in quadrantal form (N–E–S–W).
Arbitrary Meridian
Any convenient reference direction selected from a survey station toward a well-defined permanent object.
Commonly used in small-area surveys or for determining relative directions in a traverse.
Grid Meridian
A reference meridian used for map-based surveys.
Often taken as the true meridian passing through a central reference point of a region or country.
Bearings measured with respect to it are called grid bearings.
Azimuth
The horizontal angle measured clockwise from the reference meridian (usually the true north) to the survey line.
Measured from 0° to 360°.
