Two liquids A and B are mixed. The partial vapour pressures of A and B in pure state are 100 and 200 mm respectively. If they are mixed in 1:4 mole ratio, then at equilibrium pressure of the mixture, assuming that mixture obeys Raoult's law, the mole fractions of A and B present in gaseous state are :
(1) 51,54
(2) 31,32
(3) 71,76
(4) 91,98