Correct Answer - Option 1 : Declination
Declination: The horizontal angle between the True meridian and magnetic meridian is called declination. It is positive if it is to the east and negative it is to the west.
Local attraction: Local attraction is the phenomenon by which the magnetic needle is constantly prevented to point towards the magnetic north at a place. This is because that these magnetic compass is influenced by other magnetic objects at that locality such as wires carrying electric current, rails, steel and iron structures, steel tapes etc.
Magnetic Bearing: The horizontal angle which a line makes with the magnetic meridian measured from Magnetic North line is called magnetic bearing. It varies with time, and location. Magnetic meridian of a line can be measured in the field by using prismatic compass.
Azimuth: Azimuth of a line is its horizontal angle measured clockwise from geographic or true meridian.
