A Tiebreaker is an additional contest carried out to establish a winner among tied contestants. Choose one situation from the options below that best represents a Tiebreaker.

The situation that best represents a tiebreaker is:

4) RCB and KKR each finished at 140 all out.

​Tiebreaker Definition: A tiebreaker is specifically used to determine a winner when there's a tie at the end of a contest.

​Analysis of Options:

• • 1) At halftime, the score is tied at 2-2 in a football match. This is a tie during the match, not at the end. The game will continue.

  • 2) Serena and Maria have each secured 1 set in the game. This is also a tie during a match (tennis). The game will continue to a deciding set.

  • 3) The umpire tosses a coin to decide which team will have to bat first. This is a method to decide an initial advantage, not to resolve a tie in the final score.

  • 4) RCB and KKR each finished at 140 all out. This signifies that both teams completed their innings with the same score, resulting in a tie. An additional contest (like a Super Over in cricket) would be needed to determine a winner, which is the very definition of a tiebreaker.

Hence, the correct answer is "Option 4".