A singly charged positive ion moves with velocity v directed out of the page toward you. Four points are at equal distance d from the ion:
• W is directly above the ion.
• X is directly to the right of the ion.
• Y is directly below the ion.
• Z is directly to the left of the ion.
Which option lists the direction of the magnetic field at points W, X, Y, and Z, respectively?
a) East, South, West, North
b) North, East, South, West
c) West, North, East, South
d) North, West, South, East