A gas !!‘X’!! when dissolved in water, heat is evolved. Then solubility of !!‘X’!! will increase at:
a) Low pressure, high temperature
b) Low pressure, low temperature
c) high pressure, high temperature
d) High pressure, low temperature
!!X(g)+ "water"<=> X(aq)+ "heat"!!
This is exothermic reaction. Exothermic reactions are favored at low temperature according to Lechatelier's principle.
Since there is a decrese in volume in forward direction, it will be favoured at high pressure.
Therefore, option (d) is correct.