in what is one of the world's largest drug-making countries

[Maybo]

Some 3,000 firms operate 10,000 pharmaceutical factories making generics (copies of branded medicines that usually sell for a fraction of their price), over-the-counter medicines, vaccines and ingredients in what is one of the world's largest drug-making countries.
(Cough syrup deaths: Why drugs made in India are sparking safety concerns by Soutik Biswas)

Does "what" refer to "India" or "country"?

 

[Tarheel]

India. Consider the whole phrase: in what is one of the world's largest drug-making countries.

Added: It should be "a fraction of the name brand's price. Also, "country" isn't in the original text.

 

[jutfrank]

India is one of the world's largest drug-making countries.