Answer
a) Block is the correct answer
Work Step by Step
we have a list of example given in the book that is :-
Random … A A B A B B B A A B A B A B A B B A
Alternating … A B A B A B A B A B A B A B A B
Block … A A A A A A B B B B B B A A A A A A
Graft A A A A A A A A A A A A A A A A A
B B B B B B B B B
Here in the question the sequence is
B B B B B A A A A A B B B B B A A A A A
so we can say this is the type of block copolymer.
option A) block
