What is thesaurus tool in MS Word is used for?

Use for synonyms and antonyms of words or phrases for better understanding of its meaning

It works like a dictionary containing synonyms of words.

Option B is Correct. Basically it tells us about the Synonyms and Antonyms of the word.

The second option. Thesaurus is the MS office tool for selecting synonyms and antonyms of words

this tool is used for prepare documentation 

answer is B Synonyms and Antonyms words

Thesaurus in MS Word helps give you different words with the same meaning (synonym) and words with the opposite meaning (antonym) for the particular word(s) you have typed.

The thesaurus tool is used for synonyms and antonyms selection

The tool is used for synonyms and antonyms selection.

Thesaurus use for find different word with the same meaning .In Microsoft Office Word you can look up a word quickly if you right-click anywhere in your document, and then click Synonym on the shortcut menu

A gives us the correct spelling for specific word, while B is a tool that will help us to understand better the word we are using.