Which of the following are non-polar?
The correct options are
$$XeF_4$$ has two lone pairs on $$Xe$$ (two lone pairs on opposite cancel the dipoles)and is nonpolar.
Even though in $$SF_4$$ all the four $$F$$ atoms dipoles are cancelled by each other there is a lone pair on $$S$$ , hence it is polar.
all the dipoles are cancelled each other, so non-polar.
Hence options A,B & D are correct.