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

If it is possible to make only one meaningful word from the second,the fourth,the fifth,the seventh and the eleventh letters of the word $DISTRIBUTION$,the third letter of that word is your answer. If more than one such word can be formed,your answer is $M$,and if no such word can be formed,your answer is $X$.

Find which one word cannot be made from the letters of the given word: $THERMOLYSIS$.

$A$ group of letters is given which are numbered $1, 2, 3, 4, 5$ and $6$. Below are given four alternatives containing combinations of these numbers. Select the combination of numbers so that the letters arranged accordingly form a meaningful word.
$C, E, L, S, M, U$
$1, 2, 3, 4, 5, 6$

$A$ group of letters is given which are numbered $1, 2, 3, 4, 5$ and $6$. Below are given four alternatives containing combinations of these numbers. Select the combination of numbers so that the letters arranged accordingly form a meaningful word.
$K, A, T, C, E, L$
$1, 2, 3, 4, 5, 6$

The positions of how many alphabets will remain unchanged if each of the alphabets in the word $WALKING$ is arranged in alphabetical order from left to right?