The correct options are
A There were professional groups dedicated to the production of different kinds of commodities.
B The large demand for pottery was met by Kalamceyko.
During the ancient Tamil civilisation, there were professional groups dedicated to the production of different kinds of commodities. Earthen wares were a part of the daily life of the people at that time. The large demand for pottery was met by Kalamceyko or potters. Iron smelting was done in traditional furnaces. Such furnaces along with terracotta pipes and raw ore have been discovered at Kodumanal and Guttur. Blacksmiths, their tools and activities have been mentioned in the Sangam classics.