How many meaningful five-letter words can be formed with the letters $SLIKL$ using each letter only once?

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

$A$ 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.
$A, C, E, S, T, H$
$1, 2, 3, 4, 5, 6$

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

How many such pairs of letters are there in the word $HORIZONTAL$,each of which has as many letters between them in the word as they have between them in the English alphabet?

From the word $LAPAROSCOPY$,how many independent meaningful words can be made without changing the order of the letters and using each letter only once?