OCP Question: Oracle 9i introduction

Hi, All:

The following question is from OCP exam, I do not know the exactlly answer. Any help will be appreciated.

Question: Which of data type is valid when you create table? (chose three answers)

1. Timestamp
2. Interval day to second
3. Interval month to day
4. Interval year to month
5. Tomestamp with database timezone.

I know A and E are correct, but which is the third one?

Thanks
Willie Received on Mon Jun 09 2003 - 15:30:54 CDT