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

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

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

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

If it is possible to make a meaningful word with the second,the sixth,the ninth and the twelfth letters of the word $CONTRIBUTION$,which of the following will be the last letter of that word? If more than one such words can be made,give $M$ as the answer and if no such word is there,give $X$ as the answer.

If the words in the sentence,"She showed several sample snaps" are rearranged in alphabetical order,which will be the middle word?