The famous line is It is a tale told by an idiot, full of sound and fury, signifying nothing. The fragment told by idiot omits the article an, making it ungrammatical. It is a tale, full of sound and fury and signifying nothing are all grammatically well-formed. The task asks for the grammatically correct part, so we select option 1.
Note: The NTA prompt is unclear about which phrase was actually omitted; we have interpreted it as asking which listed phrase is itself grammatically well-formed.