Utilize the input text as a context reference, choose the right relationship between popular and music streaming from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

Spotify, which is arguably the most popular music streaming service in the world, is not available in India.

Answer: distribution_format