Which one of the following statements about bar magnet is correct?

• A. The pole strength of the north-pole of a bar magnet is larger than that of the south-pole.
• B. When a piece of a bar magnet is bisected perpendicular to its axis, the north and south poles get separated.
• C. When a piece of a bar magnet is bisected perpendicular to its axis, two new bar magnets are formed.
• D. The poles of a bar magnet are unequal in magnitude and opposite in nature.