Which letter-cluster will replace the question mark (?) to complete the given series?
RSBG, NPEI, ?, FJKM, BGNO
Answer & explanation
Correct answer: option 3
Explanation:
RSBG, NPEI, ?, FJKM, BGNO
The logic followed here is :
R → (-4) → N → (-4) → J → (-4) → F → (-4) → B
S → (-3) → P → (-3) → M → (-3) → J → (-3) → G
B → (+3) → E → (+3) → H → (+3) → K → (+3) → N
G → (+2) → I → (+2) → K → (+2) → M→ (+2) → O
So, the letter-cluster that replaces the (?) to complete the series is "JMHK"