Question: Which code will return the IP address of the client?
- `$HTTP_SERVER_VARS("REMOTE_IP")`
- `$_SESSION["REMOTE_ADDR"];`
- `$_SERVER["HTTP_X_FORWARDED_FOR"]`
- `getenv("REMOTE_ADDR")`
Answer: The correct answer of the above question is Option D:`getenv("REMOTE_ADDR")`