Because they provide world class facilities.

Infrastructure may be defined as those elements of economic and social changes which serve as a support system to all production activities in the economy.

Infrastructures are devided into two categories : (1) Economic and (2) Social

Social infrastructure may be defined as those elements of social change (like schools,colleges, hospitals etc.) which serve as a support system for the process of social development of a country.

Because these states have better infrastructures in the areas they excel than other states of India.