The question below consists of a set of labelled sentences. Out of the four options given, select the most logical order of the sentences to form a coherent paragraph.

P. Standing in a farmer's home in China's Henan Province in the summer of 2018, paleontologists Fenglu Han and Haishui Jiang peered down into a box of rounded lumps of rock.

Q. The farmer had collected the trove near his home in Neixiang County, which is renowned for its dinosaur eggs.

R. One stony orb in particular caught the scientists' eyes.

S. About the size and shape of a billiard ball, the fossil was unlike any dinosaur egg they'd seen before.