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

Which one word can be formed from the following letters?
$a, a, b, c, i, l, l, n, o, o, o, r, t$

Arrange the given words in alphabetical order and choose the one that comes in the second place:

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,which of the following will be eleventh from the right end?

Each of the following questions is based on the following alphabet series.
$A, B, C, D, E, F, G, H, I, J, K, L, M$
$N, O, P, Q, R, S, T, U, V, W, X, Y, Z$
If the alphabet is written in the reverse order and every alternate letter starting with $Y$ is dropped,which letter will be exactly in the middle of the remaining letters of the alphabet?

Select the series in which the letters skipped in between adjacent letters decrease in order.