Four sentences in the form of P, Q, R and S are given below which are not arranged chronologically. Select the option in which they are arranged chronologically.

P. In order of distance from the Sun, the planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto; the dwarf planet.

Q. The Sun is the largest member of the Solar System.

R. The Solar System consists of the Sun, Moon and Planets.

S. It also consists of comets, meteoroids and asteroids.