Explanation:
In this situation cancel-based incomplete recovery can be used, so the RECOVER DATABASE UNTIL CANCEL command is appropriate answer for this question.
Incorrect Answers:
2: There is no RECOVER option in the ALTER TABLE SPACE system command in Oracle.
3: The RECOVER TABLE SPACE system UNTIL CANCEL command will not work in this situation.
4: The UNTIL MISSING REDOLOG is wrong option in RECOVER DATABASE command.
5: The RECOVER DATABASE USING BACKUP CONTROLFILE command will not help to recover corrupted redo log file.
Oracle 8, DBA Certification Exam Guide, Jason S. Couchman, p. 703-706
Chapter 15: Advanced Topics in Data Recovery

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