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

Select the series in which the letters do not follow a general rule.

Number of letters skipped in between the adjacent letters in the series are consecutive even numbers. Which of the following series observes this rule?

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

Each of the following questions is based on the following alphabet series.
$A, B, C, D, E, F, G, H, I, J, K, L, M$
$N, O, P, Q, R, S, T, U, V, W, X, Y, Z$
Which letter should be the ninth letter to the left of the ninth letter from the right,if the first half of the given alphabet is reversed?

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