Which of the following letter cluster will replace the question mark (?) to complete the given series?
CATCH, DATCH, DCTCH, DCWCH, ?, DCWGM
Answer & explanation
Correct answer: option 2

Explanation:
CATCH, DATCH, DCTCH, DCWCH, ?, DCWGM
The logic followed here is :
C → (+1) → D → (+) → D → (0) → D → (0) → D → (0) → D
A → (0) → A → (+2) → C → (0) → C → (0) → C → (0) → C
T → (0) → T → (0) → T → (+3) → W → (0) → W → (0) → W
C → (0) → C → (0) → C → (0) → C → (+4) → G → (0) → G
H → (0) → H → (0) → H → (0) → H → (0) → H → (+5) → M
So, the letter-cluster that replaces the (?) to complete the series is "DCWGH"