Correct answer is -e) All the options
Module Database, Security Database, Schema Database and Triggers Database are the auxillary databases.While configuring a scheduled backup, one can also select to backup the associated auxiliary databases like security, schemas, triggers. Generally, all the content databases share these auxiliary databases so issue may arise when more than one scheduled backup tries to backup the same auxiliary database. When two backups try to backup the same auxiliary database, the backup will fail throwing XDMP-FORESTOPIN error. Generally this error comes when the system attempts to start one forest operation (backup, restore, remove, clear, etc.) while another, exclusive operation is already in progress. For example, starting a new backup while a previous backup is still in progress.
