Final answer:
The sentence that uses punctuation correctly is 'OI answered the phone, but no one seemed to be on the other end of the line.'
Step-by-step explanation:
The sentence that uses punctuation correctly is: OI answered the phone, but no one seemed to be on the other end of the line. The comma is used to separate the two independent clauses 'OI answered the phone' and 'no one seemed to be on the other end of the line.' The conjunction 'but' is used appropriately to connect the two clauses. This shows correct punctuation and sentence structure.
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