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. On closer observation, I noticed that the wolf was badly wounded.

Q. Suddenly, I heard a growl and there before me was a white timber wolf caught in a trap.

R. One evening, I was passing through the cold wilderness of South Canada.

S. I tried approaching the wolf but it backed away, furiously straining at the steel jaw trap.