Correct option is C
Option (c) is the correct order of the given sentences.
Explanation of the sequence:
1. Start with (P): "The city bus was overcrowded" sets the context.
2. Follow with (O): "as it was the last one of the evening" provides the reason for overcrowding.
3. Continue with (Q): "and this gave an opportunity" links to the action.
4. Follow with (R): "to the pickpockets" explains who benefited.
5. End with (S): "to try their skill" completes the idea.
Final Sentence:
"The city bus was overcrowded as it was the last one of the evening, and this gave an opportunity to the pickpockets to try their skill."