Explanation:
To recover from a media failure taken up to the time of failure you need the damaged files, the redo logs, and the control files from a backup taken after the database was set in ARCHIVELOG mode.
Incorrect Answers:
1: You need the damaged files from any valid backup, but only from backups taken after the database was set in ARCHIVELOG mode.
2: You need not only the damaged files, but the redo log files and control files also from backups taken after the database was set in ARCHIVELOG mode.
4: You need not only the damaged files and redo log files, but the control files also from backups taken after the database was set in ARCHIVELOG mode.
Oracle 8, DBA Certification Exam Guide, Jason S. Couchman, p. 675-683
Chapter 14: Database Failure and Recovery

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