Question

Each tab is divided into______. a)Groups b)Blocks c)Menus d)Parts

Answer 1

the answer is option A
a. groups

The ribbon is divided into tabs. 
In each tab, you can find groups

Answer 2

Tabs are normally used as a feature to format the paragraph, and it is extensively used to align the text inside the paragraph.

When users press the tab key, word inserts a tab character. Then it moves from the insertion point to the tab context.

Each tab is divided into groups, so option A) groups is the correct answer for the above question.