Arrange the given names in the order in which they would occur in a telephone directory and choose the one that comes in the middle.

If you pick up from the following alphabet,the sixth and the fourteenth letters from your right and then pick up the fifth and twentieth letters from your left and form a meaningful word,what is the first letter of that word?
$A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z$

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 is the seventh to the right of the thirteenth letter from your left?

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

If it is possible to make only one meaningful word from the second,the fourth,the fifth,the seventh and the eleventh letters of the word $DISTRIBUTION$,the third letter of that word is your answer. If more than one such word can be formed,your answer is $M$,and if no such word can be formed,your answer is $X$.

Number of letters skipped in between adjacent letters in the series is two. Which of the following series observes this rule?