Select the combination of numbers so that letters arranged accordingly will form a meaningful word.
$V, A, R, S, T, E$
$1, 2, 3, 4, 5, 6$

If in the word $CERTIFICATE$,the first and the seventh letters are interchanged,similarly the second and the eighth letters are interchanged and so on up to the fifth and eleventh letters are interchanged,then which letter will be third to the right of sixth from the right end?

If the positions of the third and tenth letters of the word $DOCUMENTATION$ are interchanged,and likewise the positions of the fourth and seventh letters,and the second and sixth letters are also interchanged,which of the following will be the eleventh letter from the right end?

If it is possible to form a word with the first,fourth,seventh and eleventh letters in the word $SUPERFLUOUS$,write the first letter of that word. Otherwise,$X$ is the answer.

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

$A$ meaningful word starting with $A$ is made from the first,the second,the fourth,the fifth and the sixth letters of the word $'CONTRACT'$. Which of the following is the middle letter of the word?