If each vowel of the word $WEBPAGE$ is substituted with the next letter of the English alphabet,and each consonant is substituted with the letter preceding it,which of the following letters will appear thrice?

Select the series in which the letters skipped in between adjacent letters decrease in order.

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

$A$ 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.
$T, P, S, L, O, I$
$1, 2, 3, 4, 5, 6$

Which of the following series observes the rule,"Skip in between adjacent letters,increasing one letter more each time to build a set of letters"?

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