The figure below shows two coils close to each other. Notice that they are wrapped in different ways. How do I know which of following alternatives is right and why?

a) When the power switch S is closed, current flows through the conductor from A to B.

b) When the power switch S is closed, current flows through the conductor from B to A.

c) Power in lead AB only occurs when power switch S is closed or opened.

d) Power in conductor AB is running continuously as long as S is closed.