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Which sentence is punctuated correctly?

Charles Dickens was a British author who wrote, Oliver Twist, David Copperfield, and Great Expectations.
Charles Dickens was a British author who wrote Oliver Twist, David Copperfield, and Great Expectations.
Charles Dickens was a British author who wrote, Oliver Twist, David Copperfield and Great Expectations.
Charles Dickens was a British author who wrote Oliver Twist David Copperfield and Great Expectations.