Which of the following terms will replace the question mark (?) in the given series? ZXE  ZWD  ZVC  ?  ZTA

ZAB SUB ZUB ZUC

ZUB

Explanation: ZXE  ZWD  ZVC  ?  ZTA The logic followed here is : Z → (0) → Z → (0) → Z → (0) → Z → (0) → Z X → (-1) → W → (-1) → V → (-1) → U → (-1) → T E → (-1) → D → (-1) → C → (-1) → B → (-1) → A   So, the letter-cluster that replaces the (?) to complete the series is "ZUB"