Explanation:
: use the REVOKE statement to revoke privileges granted to other users. Privilege granted to others through the WITH GRANT OPTION clause are also revoked.
Alice, Reena and Timber will be revoke. Incorrect answer :
1: the correct answer should be Alice, Reena and Timber
2: the correct answer should be Alice, Reena and Timber
4: the correct answer should be Alice, Reena and Timber
Reference:
Introduction to Oracle9i : SQL, Oracle University Study Guide, 13-17

---