Explanation:

- Quo-warranto: This writ questions the authority of a person or body to act in a public office. It does not protect personal freedom, but rather challenges someone's right to hold a position.

- Habeas Corpus: ?? This writ safeguards personal freedom by demanding that a person detained by authorities be brought before a court to check if detention is lawful. It prevents illegal detention and is crucial for personal liberty.

- Mandamus: This compels a public authority to perform a duty it has refused to do. It does not directly protect personal freedom.

- None of the above: Not correct, since Habeas Corpus does protect personal freedom.

?? Correct Answer: Option 2, Habeas Corpus