How many planets in the solar system are known to have rings?

The correct choice indicates that there are four planets in the solar system known to have rings. These planets are Jupiter, Saturn, Uranus, and Neptune. Each of these gas giants possesses a ring system, although the visibility and characteristics of these rings vary significantly among them.

Saturn is the most famous for its prominent and easily visible rings, made primarily of ice particles, rocky debris, and dust. Jupiter has a faint ring system composed mainly of small particles from its moons. Uranus features a complex set of rings that are dark and composed of larger particles, while Neptune also has a faint ring system that is harder to detect.

Understanding the presence of rings helps to illustrate the diverse characteristics of planets in our solar system, distinguishing gas giants from terrestrial planets, which do not have rings. The other options would suggest either an underestimation or miscount of the total number of ringed planets in the solar system.