> but actually I'll like to have the answer options (yes or no) to the right
When I open the pretest URL, I see one yes/no question on the right (top aligned with the image, hard to see) and one below the question. Seems you're on the right way.
> is it possible to have them other where on the page?
By using the techniques explained in the side-by-side chapter, you can place them anywhere relative to the question. If you speak German, you may also switch to the German manual which in addition shows an option (flexbox) thats compatible with smartphones.