जाति को 'बहिर्विवाह पर अंतर्विवाह का अध्यारोपण' (superposition of endogamy on exogamy) के रूप में किसने परिभाषित किया था?

In the traditional Indian social system, what does the concept of 'Varna' specifically refer to?

According to Yogendra Singh, the four primary characteristics of Indian society are Hierarchy, Holism, Continuity, and _______.

What is meant by the term 'Dwijas' in traditional Indian social structure?