@orthocresol That's an interesting idea, thanks.

Fascinating, thanks! I'll report this to the GRE folks. I also recently read that the electronegativities of Hydrogen and Carbon are not equal (2.2 and 2.55 respectively), so it makes sense that even Methane is slightly polar and thus can make hydrogen bonds.

@GaurangTandon Sorry, just saw this. I've updated the title, thanks.

@MaxW That answers it, thanks! If you'd like an accepted answer, please convert your comment to an answer and I'll accept. Either way, thank you.