Multiple choice Which is the only vowel on a standard keyboard that is not on the top line of letters? E I A O Reveal answer Fill a bubble to check yourself C Correct answer Explanation On a standard QWERTY keyboard, the top row of letters (QWERTYUIOP) contains all vowels except A - E, I, O, and U are on the top row, while A is on the middle row (home row) along with S, D, F, G, H, J, K, and L.