299,792,458 m/s in vacuum, somewhat less in any material medium, different in every medium.
Most of the energy we receive from Sun is the visible light or whit light emitted from the photosphere. The photosphere is one of the most coolest region of the Sun. The photosphere is the visible surface of the Sun that we are most familiar with.
Magnetic field lines come from North pole and goes to south pole, as there are two north poles, they will be going from both the poles.
In short, Your Answer would be Option 4
Hope this helps!
