Here is a bit of pseudocode to explain what I am looking to do:

```
CREATE OR REPLACE PROCEDURE sproc
(
   v_input IN VARCHAR2 DEFAULT NULL
 , refCursor OUT SYS_REFCURSOR
)
AS

CASE v_input
  WHEN 'A' THEN
    OPEN refCursor FOR
      SELECT ... FROM ...;

  WHEN 'B' OR 'C'
    OPEN refCursor FOR
      SELECT ... FROM ...;
END CASE;
END sproc;

```

How can I accomplish this 'WHEN 'B' OR 'C' clause?