Which command is used to replace word ‘cat’ (already present in the file) with ‘mouse’ at all places in a file ‘old.txt’ and save the result in a new file ‘new.txt’?

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Question:Which command is used to replace word ‘cat’ (already present in the file) with ‘mouse’ at all places in a file ‘old.txt’ and save the result in a new file ‘new.txt’?

1.sed ‘s/cat/mouce/g’ old.txt > new.txt

2.sed ‘s/cat/mouse’ old.txt new.txt

3.sed ‘/s/cat/mouse/g’ old.txt new.txt

4.sed ‘/s/cat/mouse’ old.txt > new.txt

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  1. Which command is used to replace word ‘cat’ (already present in the file) with ‘mouse’ at all places in a file ‘old.txt’ and save the result in a new file ‘new.txt’?
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