Question

Which of following options about $a$ and $b$ is correct ?

• A. a=South, b=north
• B. a=North, b=south
• C. a=South, b=East
• D. a=East, b=West

Answer 1

The correct option is B a=North, b=south

The lines of magnetic field emerge from north pole of a magnet and terminate at its south pole.

However they emerge from geographical south pole and terminate at geographical north pole.
Hence a is north pole and b is south pole.