Suddenly wireless option its gone in our raspberry pi 3. Right now I can only choose wired connection. I have tried to reboot the raspberry but the result is the same, wireless & bluetooth option its gone. Any help?
What do you mean by “gone”? Disappeared? Greyed out?
Can you supply a screenshot?
What have you changed since it was last there?
Looks like you have no wifi hardware attached or it has been disabled.
To get a better understanding of the problem you are experiencing we need more information, including logs from you. Our wiki contains detailed steps for providing the relevant info we need to help you.
cat /boot/config.txt
If you have no joy try a reinstall. If you still have no joy try another distro like Raspbian. If that also fails, you need to return the Pi.
I suspect there may be a hardware issue, but worth checking /boot/config.txt first.