Explanation:
There is no base level backup (level 0), so database can not be recovered in this situation. Before backups with 1-3 levels you need to create level 0 backup as base backup.
Incorrect Answers:
1: These backups will not help because the base level 0 backup is missing.
2: These backups will not help because the base level 0 backup is missing.
4: These backups will not help because the base level 0 backup is missing.
Oracle 8, DBA Certification Exam Guide, Jason S. Couchman, p. 632-637
Chapter 13: Overview of Backup and Recovery

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