The correct answer is (a) Article 17.
Article 17 of the Constitution of India abolishes untouchability and prohibits its practice in any form. It states that “Untouchability is abolished and its practice in any form is forbidden. The enforcement of any disability arising out of untouchability shall be an offence punishable in accordance with law.”
Article 16 prohibits discrimination on grounds of religion, race, caste, sex, place of birth, or any of them, while Article 15 prohibits discrimination on grounds of religion, race, caste, sex, place of birth, or any of them, or any of them, in matters relating to access to shops, public restaurants, hotels and places of public entertainment or in the use of wells, tanks, bathing ghats, roads and places of public resort maintained wholly or partly out of State funds or dedicated to the use of the general public.
Article 28 prohibits religious instruction in any educational institution wholly maintained out of State funds.