Final answer:
In match play golf, if it is not known which wrong ball was played first, the player incurs a penalty of loss of hole.
Step-by-step explanation:
In match play golf, if it is not known which wrong ball was played first, the player incurs a penalty. According to the Rules of Golf, the penalty is generally loss of hole. This means that the opponent wins the hole and the player who hit the wrong ball must move on to the next hole.
For example, if Player A and Player B are playing a match and Player A hits the wrong ball, but it cannot be determined which wrong ball was played first, Player A would lose the hole and Player B would be awarded the win.