Select the most appropriate meaning of the given Idiom:-

Make a clean breast of it 

Confess  especially when a person has done a wrong thing

The most appropriate meaning of the idiom "make a clean breast of it" is confess, especially when a person has done a wrong thing. The idiom comes from the idea of cleaning out one's chest, or heart, of any wrongdoing. In a figurative sense, to make a clean breast of it means to confess to something that you have done wrong, or to be completely honest about something.

The other options are not as accurate descriptions of the meaning of the idiom. Cleansing of lungs is not typically associated with the idiom "make a clean breast of it." Very nervous is not typically associated with the idiom "make a clean breast of it." Speaking in rude way is not typically associated with the idiom "make a clean breast of it."