Given information:
- Whole circle bearing = 31520

To find:
- Quadrantal bearing

Solution:

1. Definition of Whole Circle Bearing:
- Whole circle bearing is the angle measured clockwise from the north direction to the direction of the line.
- The value of whole circle bearing ranges from 0 to 360 degrees.

2. Definition of Quadrantal Bearing:
- Quadrantal bearing is the bearing of a line measured from one of the cardinal points (North, South, East or West).
- Quadrantal bearings are expressed as N-S or E-W.

3. Conversion of Whole Circle Bearing to Quadrantal Bearing:
- To convert a whole circle bearing to a quadrantal bearing, we need to identify the quadrant in which the line lies.
- Quadrantal bearings can be calculated as follows:

- For bearings between 0 and 90 degrees:
- Quadrantal bearing = N + E

- For bearings between 90 and 180 degrees:
- Quadrantal bearing = N + W

- For bearings between 180 and 270 degrees:
- Quadrantal bearing = S + W

- For bearings between 270 and 360 degrees:
- Quadrantal bearing = S + E

4. Calculation of Quadrantal Bearing:
- Here, the whole circle bearing is 31520.
- Since this value lies between 270 and 360 degrees, the line lies in the southwest quadrant.
- Therefore, the quadrantal bearing can be calculated as:

- Quadrantal bearing = S + W
- = South + (360 - 31520)
- = South + 4440
- = N4440W

Hence, the correct option is B) N4440W.