People in ancient India believed that when the ________ ritual was performed with the help of Brahmanas, it led to the spiritual rebirth of the sacrificer as a Kshatriya, even if he was not one by birth.

In Ancient Indian Statecraft, Kautilya's 'Rajamandala' theory primarily deals with:

The First Buddhist Council was held at ______.

Which ancient Indian text contains references indicating that population counts or census-like records were maintained in ancient India?