The given letter series in below pattern.
bca a
Using the same pattern, we will get complete letter series.
bca a /b c aa / bc a a / b caa

The pattern of given letter series is :-
a x y z
After completing the pattern, we will get complete letter series.
a x y z/ a x y z/ a x y z/ a x y z

As per given question, the letter series is following the below pattern.
L M N O
After using the pattern the complete letter series will be as below.
L M N O / O N M L / L M N O / O N M L

The given letter series in below pattern.
a b c d d
Using the same pattern, we will get complete letter series.
a b c d d / a b c d d/ a b c d d/ a b c

The given letter series in below pattern.
a a b c
Using the same pattern, we will get complete letter series.
a a b c/ a a a c/ a a bc

The given letter series in below pattern.
b b y t
After completing the pattern, we will get complete letter series.
b b y t / b by t / b b yt

The given letter series in below pattern.
g h i
After completing the pattern, we will get complete letter series.
g h i /g h i /gh i /g h i

As per given question, the letter series is following the below pattern.
c a
After using the pattern the complete letter series will be as below.
c a / cca a / ccca a a / cccc a aaa

As per given question, the letter series is following the below pattern.
E F G
After using the pattern the complete letter series will be as below.
E F G/ F G E/ E F G/ F G E

The given letter series in below pattern.
m m l l
After completing the pattern, we will get complete letter series.
m m l l / m m l l / mm l l