Which of the following statements (with respect to compass traversing) are correct?
A. True meridian at a station is constant.
B. True meridian passing through different points on the earth surface converges towards the pole.
C. The angle between the true meridian and the line is known as declination.
D. The angle between the magnetic meridian and the line is known as azimuth.
Choose the most appropriate answer from the options given below:
The magnetic bearing of the sun for a location at noon is $183^\circ 30'$. If the sun is exactly on the geographic meridian at noon, the magnetic declination of the location is