The correct answer is RPQP. Key Points R connects the given line as the moment is the subject of the sentence. Hence, R is the first part. P further connects the sentence 'R' where the subject requires a verb( had come). Hence, 'Q' is the second part. Q and S are co-related where part Q starts a new clause and part S completes that. Hence, Q and S are the third and fourth parts of the sentence respectively. The correct sentence after rearranging the parts: At last the moment has come she had been waiting for. Hint Important Rules to Solve the Para Jumbles: Read the sentences attentively and try to comprehend the idea or theme of the sentence and eliminate the irrelevant options. Try to identify the opening( independent sentence) and closing sentences ( concluding sentence). Try to identify the mandatory pairs. Two sentences can be connected through various connectors and other determinants.