Please choose the correct ending to complete the given sentence: Arm wrestling: A boy and a girl are sitting behind a table. they

Ending1: begin to play laying tiles on the table. Ending2: are playing a game of ping pong, talking, and doing other stuff. Ending3: are playing a game of beer pong. Ending4: begin to arm wrestle on the table.

Answer format: ending1/ending2/ending3/ending4