Which letter-cluster will replace the question mark (?) to complete the given series?
PYWB, MVYD, ?, GPCH, DMEJ
Answer & explanation
Correct answer: option 4

Explanation:
PYWB, MVYD, ?, GPCH, DMEJ
The logic followed here is :
P → (-3) → M → (-3) → J → (-3) → G → (-3) → D
Y → (-3) → V → (-3) → S → (-3) → P → (-3) → M
W → (+2) → Y → (+2) → A → (+2) → C → (+2) → E
B → (+2) → D → (+2) → F → (+2) → H → (+2) → J
So, the letter-cluster that replaces the (?) to complete the series is "JSAF"