Where should I save the presentation if I want to open it in PowerPoint?

Pr
1

ATTENTION! Question has just been asked but with a false picture.

Hey. I made a presentation on OpenOffice because I do not have PowerPoint. In school, however, it's the other way around, they only have PowerPoint. What should I do now? A teacher said, I should pull that on a usb stick and press Save as and then come options how I can save it. I did not really understand it. What should I do now? I could theoretically take the laptop and connect to a projector, right?
(In the picture you can see how I can save it, what should I choose?))

Uk

Possibility Number 1

In OpenOffice there's the possibility in the save dialog (where you type in the filename and select the folder to save) as target format "PowerPoint" or "ppt" or "pptx". Select, save name and copy to USB stick. Then open the file on the computer at school.

Option 2

Select menu item File, Export. Save the presentation as a PDF. Then copy to USB stick. Open the file on the computer at school (however, the Acrobat Reader must be installed).

Option 3

Take your notebook with you and plug it into the projector. But you have to clarify in advance if you can do that and if the existing plugs / adapters match the graphics output of your notebook (for example VGA, HDMI, DVI, …).

I would do 1) and 2). 3) would be too dangerous for me because of my own notebook in school.