Which statement is true about database links?

A database link can be created only between two Oracle databases.

Private database link creation requires the same user to exist in both the local and the remote databases.

A public database link can be created only by SYS.

A database link created in a database allows a connection from that database's instance to the target database's instance for selecting schema data.

A public database link can be used by any user allowing remote database instance connection for selecting schema data.