pls tell the correct option

Initially there is a dollar on the table and player-1 can either pick it up or say "Pass". If he picks the money up, the game ends. If he passes, another bill is added, and player-2 has the same options. If there are 4 passes the game ends and the four bills are removed from the table. Player-1 is paid 3.5 and player-2 is paid 3.5. the sub-game perfect equilibria are (a) (1, 0) (b) (0,2) (c) (3, 0) (d) (0, 4)