Explanation:

Here’s the thing—when we’re talking about Dharma, Karma, and Pollution as the main forces holding up the caste system, that idea’s most closely tied to M.N. Srinivas.

Let’s break down your options:

- Panikkar: He worked on Indian society and caste, but he didn’t really lock in on these three concepts together as the backbone.

- S.C. Dube: He was huge in Indian sociology, but not the guy who focused mainly on Dharma, Karma, and Pollution as the pillars.

- S.C. Roy: An early Indian anthropologist, looked at tribal societies more, not really famous for this idea.

- M.N. Srinivas: This is your answer. Srinivas highlighted the importance of ritual purity (pollution), Dharma (social duty), and Karma (actions and their consequences) in keeping the caste system going. He explains how these beliefs shape social order and behavior.