If the positions of the first and sixth letters of the word $BENEFICIAL$ are interchanged; similarly the positions of the second and seventh letters are interchanged and so on,which letter will be third from the right end after rearrangement?

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

If each alternate letter beginning with the first in the word $WORKING$ is replaced by the next letter in the English alphabet and each of the remaining letters is replaced by the previous letter in the English alphabet,which of the following will be the fourth from the right end after the replacement?

Arrange the given words in alphabetical order and choose the one that comes first: Guarantee,Groan,Grotesque,Guard,Group.

If it is possible to make a meaningful word with the third,the fifth,the seventh and the tenth letters of the word $OUTRAGEOUS$,which of the following will be the second letter of that word? If more than one such word can be formed,give $X$ as the answer and if no such word can be formed,give $Y$ as the answer.

Number of letters skipped in between adjacent letters in the series decreases by one. Which of the following series is observing the rule?