The correct answer is Guwahati.
Guwahati is the largest city in the Indian state of Assam. It is the most populous city in the Northeast India and the 23rd most populous city in India. Guwahati is also the most important commercial city in the Northeast India. It is a major transportation hub and is well connected to other parts of India by air, rail, and road.
Guwahati is a major destination for internal migrants. The city has a large number of people from other parts of India who have come to the city in search of employment and education. The city also has a large number of refugees from Bangladesh.
Dibrugarh is the second largest city in Assam. It is located in the Dibrugarh district of Assam. Dibrugarh is a major commercial city and is well connected to other parts of India by air, rail, and road.
Silchar is the third largest city in Assam. It is located in the Cachar district of Assam. Silchar is a major commercial city and is well connected to other parts of India by air, rail, and road.
Jorhat is the fourth largest city in Assam. It is located in the Jorhat district of Assam. Jorhat is a major commercial city and is well connected to other parts of India by air, rail, and road.
All of the above cities are major destinations for internal migrants. However, Guwahati is the largest and most important city in Assam and is therefore the most popular destination for internal migrants.