Concept:Arranging jumbled sentence parts to form a logical and grammatically correct sequence.
Explanation:The sentence begins with the subject “The clerk”.
After the subject, we need the main verb and object.
Part Q “left the money” is the only verb phrase, so Q must come first.
Next, where did he leave the money? Part P “on the desk” tells the location.
Part S “which he should have locked up” is a relative clause that refers to “the money”.
It must follow immediately after “money” or the location phrase “on the desk”.
However, the relative clause “which he should have locked up” actually describes the money that should have been locked up in the safe.
Therefore, after “on the desk”, we place S, then finally R “in the safe” to complete the idea: “which he should have locked up in the safe”.
The full sequence is Q → P → S → R, which matches option B.
A common confusion is placing P before Q, but “on the desk” cannot describe “the clerk” because a clerk cannot be “on” the desk.
Thus, the correct order is: “The clerk left the money on the desk, which he should have locked up in the safe.”
Answer:Option B (Q P S R)