here, it says which of the fallen represents a week binary acid and therefore a weak electrolyte. So remember, Ah, binary acid does not possess oxygen so automatically all the ones with oxygen are out, so we have HCL and H C n. So they both represent binary acids because of the lack of oxygen. But the one that's a weak electrolyte would have to be the one that is also a weak acid. HCL is one of our strong acids, so it would be a strong electrolyte. So by default, H C n, which is hydro scion IQ acid, would be our week binary acid and therefore are weak electro it.