How does the north pole of a magnet respond to the poles of other magnets?
a. it attracts both north and south poles.
b. it repels both north and south poles.
c. it attracts the north pole and repels the south pole.
d. it attracts the south pole and repels the north pole.

The correct answer is D.

Explanation:

Magnet has two poles- north and south. In a magnet, like poles repel each other and unlike poles attract each other.

For example, north pole attracts south pole and north pole repels north of a magnet.

In the given problem, the north pole of a magnet responds to the poles of other magnet. It attracts the south pole and repels the north pole.

Therefore, the correct answer is D.