pls tell me the correct option pls

Consider 2-person (A and B) and 2 good (x, y) economy. A's endowment is (0, 1) while B's endowment is (0, 2). B considers x and y to be perfect substitutes while A lexicographically prefers x to y. The competitive equilibrium allocation for this economy is (a) A gets (0, 1) and B gets (2, 0) (b) A gets (2, 0) and B gets (0, 1) (c) A gets (1.5, 0) and B gets (0.5, 1) (d) A gets (1, 0) and B gets (1, 1)