The question below consist of a set of labelled (P, Q, R, S) sentences. Out of four options given, select the most logical order of the sentences which form a paragraph.

The first ruler of the gods was Uranus, the personification of the sky.

P. He was married to Gaia, the goddess of the earth.

Q. After a prophecy that his children would overthrow him, the original ruler of the world hid his children inside their mother (earth).

R. Gaia hated him for this.

S. Uranus had twelve children with Gaia.

The children of the sky and the earth were known in the ancient sources as the Titans.