Correct option is A
Given: _ B _ _ _ A L _ _ L _ _
Let's check all the options:
Option (a): LALBBABA
L B A | LB A | L BA | L BA.
It is logically following the pattern.
In this given series the formation of letters as a LBA.
Option (b): BBALLBAA
B B B | AL A | L LB | L AA
It is not following logically pattern.
Option (c): LBAALLBA
L B B | AA A | L LL | L B A
It is not following logically pattern.
Option (d): BLABBALL
B B L | AB A | L BA | L LL
It is not following logically pattern.
Thus, the correct option is (a) LALBBABA.