Appa and amma are having a silly argument (Note the point, a silly argument - only in front of the kid!) after which...
Amma: V...who is chamathu (loosely translated as good!)... Amma or Appa?
V: (without batting an eyelid) Naanu (Me)
Appa: Nee pozhachupeda... (again loosely translated as..you'll survive this bad bad world and become a politician!!)