HSK 5 HSK C5/W3/V5
Correct

册

/ cè / 
Strokes

Definition

book/booklet/classifier for books

Example

As a Noun

volume; book

1
Zhuāngdìng
装订
chéngcè
成册

be bound into book form

As a Noun

imperial edict to confer nobility titles

As a Measure word

copy; volume