A series is given with one term missing. Select the correct alternative from…

Solution:

Look at each letter position separately and find its pattern.

• First letters: T, N, H, B. Each step subtracts 6 (T → N → H → B → V). So the next first letter is V.

• Second letters: O, O, O, O. This position remains O, so the next second letter is O.

• Third letters: N, V, D, L. These advance by +8 modulo 26 (N→V, V→D, D→L), so the next third letter is T.

• Fourth letters: U, W, Y, A. These advance by +2 modulo 26 (U→W→Y→A), so the next fourth letter is C.

Combining these letters gives VOTC as the missing term.