Step 1: Meaning of retracted confession.
A retracted confession is one where the accused admits guilt but later withdraws or denies it.
Step 2: Rule of law.
The general rule is that a retracted confession requires corroboration to be relied upon. Courts are cautious in convicting solely on such evidence.
Step 3: Conclusion.
Thus, a retracted confession cannot be the sole basis of conviction unless corroborated, making option (c) correct.