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

The given letter series in below pattern.
O R U X
After using the pattern the complete letter series will be as below.
O R U X/ O R U X/ O R U X/ O R U X
? ? = XRUO

As per given question, the letter series is following the below pattern.
a a a b
Using the same pattern, we will get complete letter series.
a a a b/ a a b c/ a a c d/ a a d e
Therefore,? = a a a d a

As per given question, the letter series is following the below pattern.
r tu s
After using the pattern the complete letter series will be as below.
r tu s/rt us/rtus/rtus

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

The pattern of given letter series is :-
a b b a
After using the pattern the complete letter series will be as below.
a b b a/ a b b a/ a b b a/ a b b a

As per given question, the letter series is following the below pattern.
KLM N
After using the pattern the complete letter series will be as below.
KLM N / KL M N / K L MN / K LMN

As per given question, the letter series is following the below pattern.
an d/an d
After using the pattern the complete letter series will be as below.
an d/an d/ a nd/a n d/ and/ a

As per given question, the letter series is following the below pattern.
w w w
After using the pattern the complete letter series will be as below.
w w w/ x x x/ y y y/ z z z

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