Ganeshan set up an experiment using two bar magnets one of which is marked N (North pole) and S (South pole) as shown in the figure. He noticed that the upper magnet is suspended in air. Identify X and Y poles of the upper magnet.

• A.  X is the North Pole, Y is the South Pole.
• B.  X is the South Pole, Y is the North Pole.
• C.  Both X and Y are north poles.
• D.  Both X and Y are south poles.