Correct option is C
The correct answer is (c) Article 19 — Protection of certain rights regarding freedom of speech.
Article 15: Prohibits discrimination on grounds of religion, race, caste, sex, or place of birth. It is not related to the right against exploitation.
Article 17: Abolishes "untouchability" and its practice in any form. It is not related to the abolition of titles.
Article 19: Provides protection of certain rights regarding freedom of speech, expression, assembly, association, movement, residence, and profession.
Article 14: Guarantees equality before the law and equal protection of the laws within the territory of India. It is not related to the abolition of untouchability.