Select the letter-cluster from among the given options that can replace the question mark (?) in the following series,
IBTW, JCSV, ?, LEQT
1
JCCS
2
IBWP
3
KDTW
4
KDRU
Select the letter-cluster from among the given options that can replace the question mark (?) in the following series,
IBTW, JCSV, ?, LEQT