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.

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.
$D, I, F, E, R, N$
$1, 2, 3, 4, 5, 6$

How many $D$'s are there in the following series which are immediately followed by $W$ but not immediately preceded by $K$?
$K, D, C, W, K, D, W, N, K, G, D, W, W, D, H, K, V, D, W, Z, D, W$

If the letters of the word $HANDOVER$ are arranged alphabetically from left to right,how many letters will remain at the same position?

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