Select the most appropriate meaning of the given idiom.

Give someone a taste of their own medicine

Mistreat someone in the same way they have treated others

The correct answer is OPTION 2 - Mistreat someone in the same way they have treated others

The most appropriate meaning of the idiom "give someone a taste of their own medicine" is mistreat someone in the same way they have treated others.

The idiom "give someone a taste of their own medicine" is used to describe someone who is treating another person in a way that the other person has treated them in the past. For example, if someone has been rude to you, you might say that you are going to "give them a taste of their own medicine" by being rude to them in return.