OCP CBT Question 665

Please solve the following question.

You need to configure a new listener, LISTENER_PROD, to listen on TCP port 1522 on host dbhost.example.com. The existing default listener already uses port 1521. Which configuration snippet correctly defines LISTENER_PROD in the listener.ora file?

LISTENER_PROD =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = dbhost.example.com)(PORT = 1522))
  )

LISTENER_PROD =
  (DESCRIPTION_LIST =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = dbhost.example.com)(PORT = 1522))
    )
  )

LISTENER_PROD_1522 =
  (PROTOCOL = TCP)(HOST = dbhost.example.com)(PORT = 1522)

LISTENER =
  (ADDRESS = (PROTOCOL = TCP)(HOST = dbhost.example.com)(PORT = 1522))