which three ways can you re-create the lost disk group and restore the data?

You are administering a database stored in Automatic Storage Management (ASM). You use
RMAN to back up the database and the MD_BACKUP command to back up the ASM metadata
regularly. You lost an ASM disk group DG1 due to hardware failure.
In which three ways can you re-create the lost disk group and restore the data?

A.
Use the MD_RESTORE command to restore metadata for an existing disk group by passing
the existing disk group name as an input parameter and use RMAN to restore the data.

B.
Use the MKDG command to restore the disk group with the same configuration as the backed
up disk group and data on the disk group.

C.
Use the MD_RESTORE command to restore the disk group with the changed disk group
specification, failure group specification, name, and other attributes and use RMAN to restore the
data.

D.
Use the MKDG command to restore the disk group with the same configuration as the backedup disk group name and same set of disks and failure group configuration, and use RMAN to
restore the data.

E.
Use the MD_RESTORE command to restore both the metadata and data for the failed disk
group.

F.
Use the MKDG command to add a new disk group DG1 with the same or different specifications
for failure group and other attributes and use RMAN to restore the data.

Explanation:
AC (not E):
The md_restore command allows you to restore a disk group from the metadata created by the
md_backup command.
md_restore can’t restore data, only metadata.