Explanation

In Part III of the Constitution of India, fundamental rights are classified into distinct thematic categories:

– Right to Equality (Articles 14 to 18):
– Article 14: Equality before law
– Article 15: Prohibition of discrimination
– Article 16: Equality of opportunity in public employment
– Article 17: Abolition of Untouchability (and prohibition of its practice in any form)
– Article 18: Abolition of titles
– Because the abolition of untouchability is enshrined under Article 17, it forms an integral part of the Right to Equality.
– Other categories: Right to Freedom (Articles 19–22), Right against Exploitation (Articles 23–24), and Right to Constitutional Remedies (Article 32).

Hence, the correct category is the Right to Equality — Option D.