21. Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it ?
ba _ cb _ b _ bab _
ba _ cb _ b _ bab _
22. Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it ?
_ bc _ ca _ aba _ c _ ca
_ bc _ ca _ aba _ c _ ca
23. Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it ?
ab _ _ baa _ _ ab _
ab _ _ baa _ _ ab _
24. Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it ?
ab _ aa _ bbb _ aaa _ bbba
ab _ aa _ bbb _ aaa _ bbba
25. Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it ?
_ nmmn _ mmnn _ mnnm _
_ nmmn _ mmnn _ mnnm _
26. Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it ?
a _ n _ b _ _ ncb _ _ ncb
a _ n _ b _ _ ncb _ _ ncb
27. Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it ?
a _ ba _ b _ b _ a _ b
a _ ba _ b _ b _ a _ b
28. Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it ?
cccbb _ aa _ cc _ bbbaa _ c
cccbb _ aa _ cc _ bbbaa _ c
29. Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it ?
bca _ b _ aabc __ a __ caa
bca _ b _ aabc __ a __ caa
30. Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it ?
ab __ d __ aaba __ na _ badna _ b
ab __ d __ aaba __ na _ badna _ b