Solution which have only one volatile components, The vapour pressure of volatile component in a given solution can be written by -$P_1 = x_1 P_1^0$If we compare the equations for Raoult's law and Henry's law, $( P = K_H \cdot x )$, only proportionality constant $K_H$ differes from $P_1^0$.Thus,Rault's law becomes a special case of Henry's law in which $K_H$ becomes equal to $P_1^0$.All other options are wrong for Roult's law.