Explanation:
You need to use RECOVER DATABASE with USING BACKUP CONTROL FILE command because not one of your control files is damaged and do not need to be restored. Incorrect Answer:
1: You cannot use the RECOVER DATABASE command because you have no archive logs since you are running the database in NOARCHIVE LOG mode.
2: It’s not required to switch data files because you have a full backup taken using RMAN is available on disk.
3: Control file does not require to be restored: the current control files were NOT damaged and do not need to be restored.
Reference:
OCP Oracle 9i Database: Fundamentals II Exam Guide, Rama Velpuri, p. 324-325
Chapter 13: RMAN Complete Recovery

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