If $0.05$ mole of gas are dissolved in $500 \mathrm{g}$ of water under $1 \mathrm{atm}$. pressure, $0.1$ moles will be dissolved if the pressure is $2 \mathrm{atm}$. It illustrates

We can see here that when solubility is increasing pressure is also increasing.

And, we know that Henry’s law states that the amount of gas that is dissolved in a liquid is directly proportional to the partial pressure of that gas above the liquid when the temperature is kept constant.

Hence, it is the case of Henry’s law.

Hence, option(c) is correct.