The correct relations showing Raoult's law are

According to Raoult's law, Relative lowering in vapour pressure = Mole fraction of solute                                p∘−pp∘=x2⇒p∘−pp∘=n2n1+n2or                           p∘p∘−p=n1+n2n2or                          p∘p∘−p=1+n1n2                    p∘p∘−p−1=n1n2⇒pp∘−p=n1n2or                              p∘−pp=n2n1