The correct answer is: b) Rajiv Gandhi International Airport (Hyderabad).
Rajiv Gandhi International Airport (RGIA) is the primary international airport serving the Indian state of Telangana and the neighboring state of Andhra Pradesh. It is located in Shamshabad, about 22 km (14 mi) from Hyderabad, the capital of Telangana. The airport is named after Rajiv Gandhi, the former Prime Minister of India.
RGIA is the busiest airport in the state of Telangana and the sixth busiest airport in India. It handled 15.8 million passengers in 2019. The airport has two terminals, Terminal 1 and Terminal 2. Terminal 1 is the older terminal and handles domestic flights. Terminal 2 is the newer terminal and handles international flights.
RGIA is served by a number of domestic and international airlines, including Air India, IndiGo, SpiceJet, Jet Airways, Qatar Airways, Emirates, Etihad Airways, and British Airways. The airport has a number of facilities, including a shopping mall, a food court, a business center, and a VIP lounge.
The other options are incorrect because they are not the primary gateway for air travel to Andhra Pradesh.
a) Vijayawada International Airport is located in Vijayawada, the capital of Andhra Pradesh. It is the second busiest airport in the state after RGIA. The airport handled 4.5 million passengers in 2019.
c) Visakhapatnam International Airport is located in Visakhapatnam, a port city in Andhra Pradesh. It is the third busiest airport in the state after RGIA and Vijayawada Airport. The airport handled 2.3 million passengers in 2019.
d) Chennai International Airport is located in Chennai, the capital of Tamil Nadu. It is the fourth busiest airport in India. The airport handled 44.8 million passengers in 2019.