Select the most appropriate meaning of the given idiom.

Method to one’s madness

Seeming disorderly yet having a structure

The most appropriate meaning of the idiom "method to one's madness" is seeming disorderly yet having a structure.

The other options are incorrect.

• "Being very neat and particular about details" is not the same as method to one's madness. Being neat and particular about details means being organized and orderly.
• "Always behaving like a mad person" is not the same as method to one's madness. Always behaving like a mad person means being irrational and unpredictable.
• "Not following rules and conventions" is not the same as method to one's madness. Not following rules and conventions means being rebellious and nonconformist.

The idiom "method to one's madness" is used to describe a situation that seems chaotic or unpredictable, but actually has a hidden order or logic. For example, you might say "There's a method to his madness" if someone is doing something that seems crazy, but actually has a good reason for doing it.