In the normal Mathematica language, where no built-in symbols are redefined and no evil things happen, is it a valid assumptions, that no function symbol (Plot, Print, Attributes) is at the same time and option name (like PlotRange, ColorSpace, ImageSize). Furthermore, is it save to assume that symbols carrying an OwnValue ($MaxNumber, Pi, $Failed) are in neither of the other two groups?

To say it straight out: Does someone find a function, which is used as an option too?