The correct answer is: b) Guwahati.
Guwahati is the largest city in the Indian state of Assam and the largest city in the northeastern region of India. It is also the most important commercial and transportation hub in the region. The city is located on the banks of the Brahmaputra River and is home to a number of important historical and cultural sites, including the Kamakhya Temple, the Guwahati Zoo, and the Assam State Museum.
The Lokpriya Gopinath Bordoloi International Airport is the main international airport in Guwahati and is the second busiest airport in the northeastern region of India. The airport is located about 20 kilometers from the city center and is connected to Guwahati by a number of public transportation options, including taxis, buses, and auto-rickshaws.
The airport has a number of international and domestic flights and is a major hub for tourism in the northeastern region of India. The airport is also a major cargo hub and is used to transport a variety of goods, including tea, spices, and other agricultural products.
The other options are incorrect because they are not located in Mizoram. Imphal is the capital of the Indian state of Manipur, Silchar is a city in the Indian state of Assam, and Kolkata is the capital of the Indian state of West Bengal.