B

Step 1: Understand the terms involved. The magnetic meridian is the direction of the magnetic field at a given location, while the geographical meridian corresponds to the north-south line on the Earth's surface based on geographical coordinates.
Step 2: The angle that measures the deviation of the magnetic meridian from the geographical meridian is known as the angle of declination. This angle varies from location to location on Earth.
Step 3: To differentiate it from the angle of dip, which measures the angle at which magnetic field lines enter the Earth, we confirm that the correct term for the angle between the magnetic and geographical meridians is the angle of declination.
Conclusion: Therefore, the correct answer is Option B: Angle of declination.