Select the option that is related to the fifth letter-cluster in the same way as the second letter-cluster is related to the first letter-cluster and the fourth letter-cluster is related to the third letter-cluster.
SAM : UES :: RAT : TEZ :: LOI : ?
Answer & explanation
Correct answer: option 1

Explanation:
SAM : UES :: RAT : TEZ :: LOI : ?
The logic followed here is :
S → (+2) → U → (-3) → R → (+2) → T → (-8) → L → (+2) → N
A → (+4) → E → (-4) → A → (+4) → E → (+10) → O → (+4) → S
M → (+6) → S → (+1) → T → (+6) → Z → (+9) → I → (+6) → O
So, the letter-cluster that replaces the (?) to complete the series is "NSO"