* After creation and initial inserts, the pcode for 'pen' is updated to 10, and then committed.
* The 'pencil' row is deleted and not yet committed.
* A savepoint b is set after the deletion of the 'pencil' row.
* The 'fountain pen' pcode is updated to 30, followed by setting savepoint c.
* The 'pen' row (now with pcode 10) is deleted.
* A rollback to savepoint b reverts the deletion of 'pen' and the update to 'fountain pen', but not the deletion of 'pencil', which was committed earlier due to the scope of the savepoint.
* Therefore, after the final commit:
* A: The code for 'pen' is 10, since the update was committed and the subsequent delete was rolled back.
* C: There is no row containing 'pencil' because its deletion was committed.
* F: There is a row containing 'pen' because the deletion was rolled back to savepoint b which was set after the deletion of 'pencil'.