Which of the following is the main object guaranteed by Article 21 of the…

Concept: Part III of the Constitution guarantees several distinct Fundamental Rights, and each right is anchored to a specific Article whose own text and marginal heading identify what it protects — equality, freedom from exploitation, freedom of religion, or life and personal liberty are each governed by different Articles.

Application: The Article named in the question states, "No person shall be deprived of his life or personal liberty except according to procedure established by law," and its own marginal heading is "Protection of life and personal liberty." So its main object is safeguarding an individual's life and personal liberty against arbitrary action by the State.

• Equal treatment before the law and equal protection of the laws is a different, separately-numbered guarantee, not the one named in the question.

• Prohibition of trafficking and forced labour, including the bar on hazardous child employment, is likewise a separate, differently-numbered guarantee.

• Freedom of conscience and the freedom to profess, practise, and propagate religion is also a separate, differently-numbered guarantee.

• Only the protection of life and personal liberty matches the Article's own text and heading exactly as quoted above.

Result: The option whose wording matches the Article's own text and marginal heading — protection of life and personal liberty — is the correct answer.