Exp) Option a is the correct answer.

Since 2019, 6 Greenfield airports namely, Kalaburagi  (project cost Rs. 175.57 crore), Orvakal (Kurnool) (project cost Rs. 187 crore), Sindhudurg (project cost Rs. 520 crore), Itanagar (project cost Rs. 646 crore) Kushinagar (project cost Rs. 448 crore) and Mopa (project cost Rs.2870 crore) have been operationalised, out of which Kushinagar and Mopa airports are International airports.

Statement 1 is correct. Donyi Polo Airport, Itanagar is the first greenfield airport in Arunachal Pradesh, has been developed in an area of over 690 acres, at a cost of more than Rs. 640 crores. It was inaugurated by PM Modi in 2022.

Statement 2 is correct. Kushinagar International Airport, is a greenfield airport, was inaugurated by Prime Minister Narendra Modi in October 2021.

Statement 3 is incorrect. Vijayawada International airport is not a greenfield project.

Source: https://www.financialexpress.com/business/airlines-aviation-greenfield-airports-in-india-how-many-to-be-developed-as-international-airports-know-all-about-operations-investment-and-more-3190505/

https://pib.gov.in/PressReleaseIframePage.aspx?PRID=1897659

https://pib.gov.in/PressReleasePage.aspx?PRID=1877228#:~:text=Donyi%20Polo%20Airport%2C%20Itanagar,-In%20a%20key&text=The%20airport%2C%20which%20is%20the,cost%20of%20more%20than%20Rs.

https://pib.gov.in/PressReleasePage.aspx?PRID=1943211