Which of the following letter clusters can replace the question mark (?) in the given series to make it logically complete?
DNU, ?, NXE, SCJ, XHO
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. ISZ.
D + 5 = I, I + 5 = N, N + 5 = S, S + 5 = X
N + 5 = S, S + 5 = X, X + 5 = C, C + 5 = H
U + 5 = Z, Z + 5 = E, E + 5 = J, J + 5 = O