Use of IN statement with Interbase SQL

Hi,

Anyone can help with the following:

I have a table with a varchar field in the form of   AB, CD, EF, RT

I would like to make the following a query

SELECT OPTIONS FROM TABLEX WHERE OPTIONS IN (AB,RT);

And the result should show all the rows with the filed OPTION
containing:

AB and RT (like in AB,RT,WZ)
AB and RT (like in AB,CC, FF,RT)
AB, or RT (like in AB,CD,EF or CF,RT,TT,ZE)

Any help, guidence is apreciated.

Thanks
Billy
I am using Interbase 6.