Magnetic meridian is an imaginary:
line along north-south
point
vertical plane
horizontal plane
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC NDA-2 – 2015
The magnetic meridian at any point on the Earth’s surface is an imaginary vertical plane that passes through the geographic location and the Earth’s magnetic poles (or more precisely, along the local direction of the Earth’s magnetic field lines). The angle between the magnetic meridian and the geographic meridian (the vertical plane containing the geographic North and South poles) is called magnetic declination.