Which one of the following works elaborates on the administration of Pataliputra?

Which one of the following inscriptions speaks about the Kalabhras?

The Later Vedic Gangetic Plain reveals the Culture of the:

In 1956, Fr. Henry Heras proposed a theory that the Indus Script is:

The inscription that mentioned about the Kulasekharas for the first time ----------

Umbrella stones and hood stones represent the ------ phase of pre history of Kerala