Number of letters skipped in between adjacent letters in the series are increased by one. Which of the following alternatives observes this rule?

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

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 every even letter beginning from $B$ is replaced by an odd number beginning with $3$,which letter/number will be the third to the right of the tenth number/letter counting from your right?

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

If it is possible to make a meaningful word with the third,fifth,eighth and tenth letters of the word $DISTRIBUTE$,which of the following will be the third letter of that word? If no such word can be made,give $X$ as the answer and if more than one such word can be made,give $M$ as the answer.

If the positions of the fifth and twelfth letters of the word $GLORIFICATIONS$ are interchanged; and likewise the position of the fourth and fourteenth letters,the third and tenth letters,the second and eleventh letters and the first and thirteenth letters are interchanged,which of the following will be the twelfth letter from the right end?