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.
KLC ∶ FNL ∶ ∶ YCS ∶ VEZ ∶ ∶ CPQ ∶ ?
1
TRD
2
SRE
3
TSF
4
NRD