In which one of the following Articles, does the Constitution of India

In which one of the following Articles, does the Constitution of India abolish ‘untouchability’ and its practice in any form ?

Article 17
Article 18
Article 19
Article 15
This question was previously asked in
UPSC CISF-AC-EXE – 2017
Article 17 of the Constitution of India explicitly abolishes ‘Untouchability’ and forbids its practice in any form. The enforcement of any disability arising out of ‘Untouchability’ is to be an offence punishable in accordance with law.
– Article 17 is one of the fundamental rights included in Part III of the Constitution, specifically under the Right to Freedom (though sometimes categorized separately due to its significance).
– The Protection of Civil Rights Act, 1955 (originally the Untouchability (Offences) Act, 1955) was enacted by Parliament to give effect to Article 17.
– Article 15 prohibits discrimination on grounds only of religion, race, caste, sex, or place of birth.
– Article 18 abolishes titles.
– Article 19 guarantees several freedoms like speech, assembly, association, movement, residence, and profession.