Select the most appropriate meaning of the given Idiom:-

"To make Cock and bull story"

An unbelievable story generally concocted 

The most appropriate meaning of the idiom "to make a cock and bull story" is an unbelievable story generally concocted. The idiom comes from the idea of a cock and bull being an absurd or ridiculous story. In a figurative sense, to say that someone is "making a cock and bull story" means that they are telling an unbelievable or implausible story.

The other options are not as accurate descriptions of the meaning of the idiom. Telling a fable is not the same as telling an unbelievable story. Giving excuses for an error is not typically associated with the idiom "to make a cock and bull story." To be badly organized is not typically associated with the idiom "to make a cock and bull story."