The correct answer is: b) Guwahati, Assam.
Guwahati is the largest city in the Indian state of Assam and the largest city in the Northeast India. It is also the gateway to the Northeast India. The city is well connected to other parts of India by air, rail and road. The Lokpriya Gopinath Bordoloi International Airport is the nearest international airport to Mizoram. The airport is located in Guwahati, Assam, about 100 kilometers from Aizawl, the capital of Mizoram. The airport has regular flights to major cities in India and other countries.
The other options are incorrect because:
- Silchar is a city in the Indian state of Assam. It is located about 200 kilometers from Aizawl. The city is well connected to Aizawl by road. However, there is no international airport in Silchar.
- Imphal is a city in the Indian state of Manipur. It is located about 300 kilometers from Aizawl. The city is well connected to Aizawl by road. However, there is no international airport in Imphal.
- Chittagong is a city in Bangladesh. It is located about 400 kilometers from Aizawl. The city is well connected to Aizawl by road. However, there is no international airport in Chittagong that serves Mizoram.