Article 19
- Article 19 of the Constitution of India guarantees six fundamental rights to all citizens of India.
- These rights include the right to freedom of speech and expression, the right to assemble peacefully and without arms, the right to form associations or unions, the right to move freely throughout the territory of India, the right to reside and settle in any part of the country, and the right to practice any profession, occupation, trade, or business.
- These rights are available to all citizens, irrespective of their nationality, and aim to protect and promote individual liberties.

Article 20
- Article 20 guarantees protection against certain convictions and punishments under the Indian legal system.
- It states that no person shall be convicted of any offense except for violation of a law in force at the time of the commission of the act.
- It also prohibits double jeopardy, which means a person cannot be punished twice for the same offense.
- Additionally, it protects individuals against self-incrimination, stating that no person accused of an offense shall be compelled to be a witness against themselves.
- These protections under Article 20 are available to both citizens and non-citizens, ensuring fair treatment and safeguarding against arbitrary actions by the state.

Article 21
- Article 21 is one of the most fundamental and important provisions of the Constitution of India.
- It guarantees the right to life and personal liberty to all persons, including citizens and non-citizens.
- It ensures that no person shall be deprived of their life or personal liberty except according to the procedure established by law.
- This right encompasses a wide range of liberties including the right to privacy, dignity, and protection against arbitrary actions of the state.
- It also includes the right to live with human dignity, the right to health, the right to a clean environment, and the right to a fair trial.
- Article 21 reflects the commitment of the Indian Constitution to protect the inherent rights and dignity of every individual within its territory.

Article 22
- Article 22 provides certain safeguards to persons who are arrested or detained under the Indian legal system.
- It ensures that every person who is arrested must be informed of the grounds of their arrest and has the right to consult and be defended by a legal practitioner.
- It also guarantees the right to be produced before the nearest magistrate within 24 hours of arrest and prohibits detention beyond that period without the authority of a magistrate.
- These protections are available to both citizens and non-citizens and aim to prevent arbitrary arrest and detention.

Conclusion
- Among the options given, Article 19 is the only fundamental right that is available exclusively to the citizens of India.
- It guarantees various freedoms and liberties to all citizens, emphasizing the importance of individual rights and democratic values.