Select the letter cluster from among the given options that can replace the question mark (?) in the following series.

AZP, BYQ, CXR, (?)

Given: AZP, BYQ, CXR, (?)

Logic: In this given alphabetical series, the first letter is increased by 1, the second letter is decreased by 1, and the third letter is increased by 1.

First letter:​

A + 1 = B; B + 1 = C; C + 1 = D

Second letter:​

Z - 1 = Y; Y - 1 = X; X - 1 = W

Third letter:​

P + 1 = Q; Q + 1 = R; R + 1 = S

So, the missing term in the series will be DWS.

Thus, the correct answer is (b).