Which of the following sentences is punctuated correctly for formal legal writing?

The law student said, 'My contracts professor is so wise. She said, 'Remember Justice Cardozo's statement, 'Law never is, but is always about to be.' Thus, you will never stop studying the law.''

The law student said, "My contracts professor is so wise. She said, "Remember Justice Cardozo's statement, "Law never is, but is always about to be." Thus, you will never stop studying the law.""

The law student said, "My contracts professor is so wise. She said, 'Remember Justice Cardozo's statement, 'Law never is, but is always about to be.' Thus, you will never stop studying the law.'"

The law student said, "My contracts professor is so wise. She said, 'Remember Justice Cardozo's statement, "Law never is, but is always about to be." Thus, you will never stop studying the law.'"

please answer it with correct option example 1,2,3,4