Which one is the open source operating system?

The answer is correct because Linux is an open-source operating system, while the other options listed are not. Here's a brief explanation of each:

    
• Linux: This is a widely used open-source operating system, meaning its source code is available for anyone to view, modify, and distribute. It is often used for servers and desktops.
    
• iOS: This is a proprietary operating system developed by Apple for its devices. The source code is not publicly available.
    
• Windows: This is another proprietary operating system created by Microsoft, and its source code is also not available to the public.
    
• Google: This is not an operating system but rather a tech company. It does have operating systems like Chrome OS and Android, but those are not the answer to this question.

In summary, Linux stands out as the only option that is open source.

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