From the given alternatives, select the set of letters that can come in place of the question mark (?) in the following series.
BEI, EHL, HKO, KNR, ?
1
NPS
2
NRU
3
NQU
4
NQT
From the given alternatives, select the set of letters that can come in place of the question mark (?) in the following series.
BEI, EHL, HKO, KNR, ?