At a fixed temperature the Henry's law constants (for $p=K_{H}x$) of gases X and Y in water are $K_X=4.0\times 10^4$ bar and $K_Y=1.6\times 10^5$ bar. Which statements are correct?

1. ATo dissolve equal mole fractions, Y needs four times the partial pressure required for X.
2. BY at $8.0$ bar and X at $2.0$ bar give the same dissolved mole fraction.
3. CAt a partial pressure of $2.0$ bar, the mole fraction of dissolved X is $2.0\times 10^{-5}$.
4. DAt equal partial pressures, the mole fraction of dissolved X is four times that of dissolved Y.