Which two are true about automatic block repair? (Choose two.) 

Answer options:

A. Automatic block repair can repair blocks with no standby database if DB_BLOCK_CHECKING = TRUE.B. Real-Time Query must be enabled on a physical standby database for automatic block repair to be done on that physical standby database.
C. Real-Time Query must be enabled on a primary database for automatic block repair to be done on any of its physical standby databases.
D. It is not possible for media corrupt blocks.
E. Real-Time Query must be enabled on a physical standby database for automatic block repair to be done on its primary database.

BC