Which of the following factor(s) affect the solubility of a gaseous solute in the fixed volume of liquid solvent ?

Which of the following factor(s) affect the solubility of a gaseous solute in the fixed volume of liquid solvent ?
(i) Nature of solute
(ii) Temperature
(iii) Pressure
(a) (i) and (iii) at’constant T
(b) (i) and (ii) at constant P
(c) (ii) and (iii) only
(d) (iii) only