Q: itunes store does not show Music as an option on the top bar

Where are you located? Music may not be an available option depending upon where you are.

If it doesn't show up as an option, then it is not available where you are. Nothing anyone can do to help.

I'm facing same problem... iTunes app provide music tab only to the customers registered to iTunes US store

Garth, 

Each country's iTunes Store has a different selection.  The majority of them, including India's, do not sell songs.

For a list of what is available in each country, see this document: iTunes Store: Which types of items can I buy in my country?