Explanation:

- Article 19: This article guarantees freedom of speech and expression, which forms the basis for the liberty of the press in India.

- Article 20: It provides protection in respect of conviction for offenses, ensuring fair trial practices, but it's not related to the press.

- Article 21: Ensures the right to life and personal liberty, providing a broad spectrum of rights beyond press freedom.

- Article 22: Offers protection against arrest and detention in certain cases, unrelated to press freedom.

The correct answer is:

- Article 19