Option (1) is incorrect: A retracted confession is one which is withdrawn or retracted later on by the person making it. It is a very weak type of evidence.
Option (2) is incorrect: Doesn’t remain in evidence till corroborated
Option (3) is correct: A confession, when retracted by the person making it, becomes a weak type of evidence and will require to be corroborated while in trial.
Option (4) is incorrect: No such provision