Which letter-cluster will replace the question mark (?) to complete the given series?

DAJ, GEL, JIN, MMP, ?

Which letter-cluster will replace the question mark (?) to complete the given series?

RMTS, WGAK, BAHC, GUOU, ?

Which letter-cluster will replace the question mark (?) to complete the given series?

TTDS, VMLP, XFTM, ZYBJ, ?

Which letter-cluster will replace the question mark (?) to complete the given series?

FHG, IKJ, LNM, ?

Which letter-cluster will replace the question mark (?) to complete the given series?

TMT, ZOB, FQJ, LSR, ?

Which letter-cluster will replace the question mark (?) to complete the given series?

CABQ, CEJC, CIRO, CMZA, ?

Which letter cluster will replace the question mark (?) to complete the given series?
 ANGE, DSBB, GXWY, ?

Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
AAI, AEI, AII, AOI, ?