If it is possible to form a word with the first,fourth,seventh and eleventh letters in the word $SUPERFLUOUS$,write the first letter of that word. Otherwise,$X$ is the answer.

Arrange the given words in alphabetical order and choose the one that comes first.

Each of the following questions is based on the following alphabet series.
$A, B, C, D, E, F, G, H, I, J, K, L, M$
$N, O, P, Q, R, S, T, U, V, W, X, Y, Z$
If the given alphabet is arranged in reverse order,which letter will be the eighth letter to the left of the seventh letter counting from the right end?

Arrange the given words in alphabetical order and choose the one that comes first.

Study the letter series given below and answer the question that follows:
$H, D, Y, S, M, W, N, B, Q, P, O, C, R, T, B, L, Z, V, E, G, U, F$
Which letter has the same neighbours as in the alphabetical order,although they have changed places?

If with the third,fourth,fifth,seventh and tenth letters of the word $PERSONALITY$,a meaningful word is formed,then the first letter of the word is the answer. If no word is possible,then $X$ is the answer.