SNAP Alphabet and Mixed Series questions

Given the series Z, Y, X, V, S, the next alphabet will be?

D_F_DEE_D_EF_DE_F

In these questions, there are four groups of letters, words or numbers listed as (a), (b), (c) and (d). One of the groups does not belong to the same category as others. Find the odd one out. Unscramble the letters in the given words and find the odd one out

Complete the following series by replacing the ? :
(TBLD, VEPI, XHTN, ?)

Complete the following series.
(GMSY, IOUA, KQWC, ?)

Find the circle, which does not include a word using all letters.

Where should the letter ‘W’ be placed?

What is the next letter in the series?
U, F, Q, J, M, N