Two magnets are used to magnetize a soft iron bar PQ as illustrated in the diagr...

When a soft iron bar, like PQ in the diagram, is placed near two magnets, it gets magnetized by a process called magnetic induction. In this case, the north pole of the first magnet is facing point P and the south pole of the second magnet is facing point Q.

During the magnetic induction process, the soft iron bar will develop the opposite polarity at the end closest to each magnet. This means that at point P, which is closest to the north pole of the first magnet, a south pole will be induced. Similarly, at point Q, which is closest to the south pole of the second magnet, a north pole will be induced.

Therefore, the correct polarity at P and Q is Option D: N and S.