How many meaningful English words can be made with all the letters $ERTU$ using each letter only once in each word?

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

$A$ 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.
$I, P, E, L, O, C$
$1, 2, 3, 4, 5, 6$

Arrange the given words in alphabetical order and choose the one that comes in the second place:

If we make a meaningful word with the first,fourth,ninth and fourteenth letters of the word $ADMINISTRATION$,which of the following will be the third letter of that word from the right end of that word?

Which letter in the word $SELFRIGHTEOUSNESS$ does not change its position when the letters are reversed?