Dress pants (kahkis will do . . .But. . .read my note below), dress shirt, and tie.
Note: If wearing kahkis, a tie usually does not go too well. I try to think with a slight style and fashion sense as it is, if you're not so in tuned, then do with the kahkis, dress shirt and tie. If you are, I'd stick to the usual dress pants (black, gray), neutral dress shirt, and neutral tie.
Good luck
My examiner also told me as we were walking out to the plane that I could take the tie off now if I felt like it. . .I declined as I feel just fine wearing a tie.