Which two RMAN commands may be; used to back up only the PDB1 pluggable database?

Your multitenant container database has three pluggable databases (PDBs): PDB1, PDB2, and
PDB3.
Which two RMAN commands may be; used to back up only the PDB1 pluggable database?

A.
BACKUP PLUGGABLE DATABASE PDB1 while connected to the root container

B.
BACKUP PLUGGABLE DATABASE PDB1 while connected to the PDB1 container

C.
BACKUP DATABASE while connected to the PDB1 container

D.
BACKUP DATABASE while connected to the boot container

E.
BACKUP PLUGGABLE database PDB1 while connected to PDB2

Explanation:
To perform operations on a single PDB, you can connect as target either to the root
or directly to the PDB.
* (A) If you connect to the root, you must use the PLUGGABLE DATABASE syntax in your RMAN
commands. For example, to back up a PDB, you use the BACKUP PLUGGABLE DATABASE
command.
* (C)If instead you connect directly to a PDB, you can use the same commands that you would
use when connecting to a non-CDB. For example, to back up a PDB, you would use the BACKUP
DATABASE command.
Reference: Oracle Database Backup and Recovery User’s Guide 12c, About Backup and
Recovery of CDBs