What does the following command do ? grep − vn "abc" x

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Question:
What does the following command do ?
grep − vn  "abc" x

1. It will print all of the lines in the file x that match the search string "abc"

2.It will print all of the lines in file x that do not match the search string "abc"

3.It will print total no of the lines in file x that match the search string "abc"

4.It will print the specific line numbers of file x in which there is a match for the string "abc"

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