The correct answer is: b) Sivasagar.
Sivasagar is a city in the Indian state of Assam. It is the headquarters of Sivasagar district and the Sivasagar division. The city is located on the banks of the Brahmaputra River, about 300 kilometers (190 mi) east of Guwahati.
Sivasagar was founded in 1699 by the Ahom king Rudra Singha. It was the capital of the Ahom kingdom from 1699 to 1788. The city is home to a number of important historical and archaeological sites, including the Rang Ghar, the Kareng Ghar, and the Sibsagar Fort.
The Rang Ghar is a large water tank that was built by Rudra Singha. It is one of the most important historical sites in Sivasagar. The Kareng Ghar is a palace that was built by the Ahom kings. It is now a museum. The Sibsagar Fort is a large fort that was built by the Ahom kings. It is now a protected monument.
Sivasagar is a popular tourist destination. The city is home to a number of hotels, restaurants, and shops. It is also well connected by road and rail to other parts of Assam.
The other options are incorrect because:
- Dimapur is a city in the Indian state of Nagaland. It is the capital of Nagaland.
- Jorhat is a city in the Indian state of Assam. It is the headquarters of Jorhat district and the Jorhat division.
- Tezpur is a city in the Indian state of Assam. It is the headquarters of Sonitpur district.