What should come next in the following letter sequence?

A A B A B C A B C D A B C D E A B C D

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

CAP, AXL, YUH, WRD, ?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

BKP, EMQ, IPS, NTV, ?

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
a_b_a_c_a_bc

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
122, 197, 290, ?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
AY, CW, EU, ?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
C A E, F D H, I G K, ?

Select the related word/letters/number from the given alternatives.
DB: IC:: YE: ?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
LOP, MPQ, NQR, ORS, ?