निम्नलिखित में से किस समाजशास्त्री ने भारत में जाति व्यवस्था पर व्यापक रूप से कार्य या लेखन नहीं किया है?

The hierarchy in the traditional Indian caste system is fundamentally based on the concept of:

The idea of 'discrete castes' has been propounded by:

The book 'The Twice-Born' by Morris Carstairs portrays caste attributes in which state of India?