You need to Find an Avian Vet where you live and ask him/her what is best for your bird. You have different food available in India than we have in the USA.
Here in the US, Harrison's or Roudybush pellets should be 80% of the bird's diet with the other 20% healthy treats that includes seed.
If you have a baby bird that is not weaned, then you need to return the bird back to the breeder and insist that they hand feed the bird until it has been weaned for a couple of weeks.