What was the name of Lord Krishna's 'Chakra'

........... flows in all the three worlds, and is called 'Tripathaga'.

The birthplace of which Alzwar is correctly matched

'Sanatana Dharma' means

The age at which Sambandar attained liberation (mukti)

Name the 'Purana' which discusses about death, afterlife, sin and description of the city of Yama