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

P. The award is named after Alfred Nobel, the Swedish inventor of dynamite.

Q. A Nobel Prize is an award that is given to someone whose work has benefitted society.

R. This award is given in six categories, and medicine is one of those categories.

S. This year Professors David Julius and Ardem Petapoutian have won this prize for medicine.