Without login to a particular database, how can I check options used by a database from OEM,
I've 200 databases registered in the said OEM.
Is it possible to get option information of the registered databases from OEM as a report?
It most certainly is! You can look at the results from the mgmt$db_featureusage view. DBAKevlar-Oracle had a good example of this on her blog as well.
Hope this helps