What is a large group of the Indian population was technically outside of the traditional caste system and had no rights in society.

they were known as The Untouchables

Explanation:

members of the lowest level of traditional Indian Society, technically outside the class system .

the correct option is: a liberal.

the kind of person that is most likely to hold a left-wing political ideology is liberal because they have in common that they support human individual rights and liberties. also, they both have politically and economically centrist.

moreover, a liberal believes that everyone should have equal rights as well as opportunities to succeed in life, and the freedom to make their own decisions as long as they don't attack the rights of other people. all people deserve the same opportunities and basic needs.