Getting List data from one list to another.

Hi,

I have a list called Clients where I have items with columns Client and Project

For Ex : Client         Project

             Test1          Desc1

             Test2          Desc1

             Test1          Desc2

Now I have another List called Requirement with few columns.

In this Requirement list, I want to bring Client and corressponding Project both in dropdowns (so that while creating requirement they can select client and its corresponding available projects) while creating new item for this list!!

How can it be done??

Regards,

Shreyas

Regards, Shreyas R S