निम्नलिखित में से कौन सा अभिलेख यह साबित करता है कि चन्द्रगुप्त मौर्य का प्रभाव पश्चिम भारत तक फैला हुआ था?

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?