Among the given options, Saturn has the largest number of known satellites. Satellites, also known as moons, are natural objects that orbit around a planet.

Option 1, Mars, is not the correct answer as it only has two known satellites, Phobos and Deimos.

Option 2, Neptune, is not the correct answer either, as it has a total of 14 known satellites, which is fewer than the number of Saturn`s satellites.

Option 3, Jupiter, is also not the correct answer, even though it has many known satellites. Jupiter has a total of 79 known satellites, second only to Saturn.

Option 4, Saturn, is the correct answer as it has the largest number of known satellites among the given options. Saturn has a total of 82 known satellites, with the moon named Titan being the largest and most well-known.

In conclusion, Saturn has the largest number of known satellites among the given planets.