Which UNIX/Linux command is used to make all files and sub-directories in the directory “progs” executable by all users?

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Question:
Which UNIX/Linux command is used to make all files and sub-directories in the directory “progs” executable by all users?

1.chmod −R a+x progs

2.chmod −R 222 progs

3.chmod −X a+x progs

4.chmod −X 222 progs

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