How many pairs of letters are there in the word $DELUSION$ which have as many letters between them in the word as there are in the English alphabet?

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 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?

In the following letter sequence,how many $n$'s are followed by $m$ but not preceded by $h$?
$a, g, r, h, t, n, m, b, c, n, m, l, b, u, v, n, m, h, e, r, h, n, m, g, f, e, h, n, m, e, c, n, m, w, q, a, n, m, h, l, b$

How many independent words can $DETERMINATION$ be divided into without changing the order of the letters and using each letter only once?

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