Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
acbd, fheg, ikjl, npmo, ?, vxuw
1
rtqs
2
rtsu
3
prqs
4
qsrt
Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
acbd, fheg, ikjl, npmo, ?, vxuw