Which practice does our Indian Constitution abolish?

Untouchability

The correct answer is Option 1 - Untouchability

The Indian Constitution abolishes the practice of untouchability.

Attainment of equality requires that all such restrictions or privileges should be brought to an end. Since many of these systems have the sanction of law, equality requires that the government and the law of the land should stop protecting these systems of inequality. This is what our Constitution does. The Constitution prohibits discrimination on grounds of religion, race, caste, sex or place of birth. Our Constitution also abolishes the practice of untouchability. Most modern constitutions and democratic governments have formally accepted the principle of equality and incorporated it as identical treatment by law to all citizens without any regard to their caste, race, religion or gender.