Sivasagar is a city in Assam, India. It is known for its historical monuments from the Ahom Kingdom. The Ahom Kingdom was a powerful kingdom that ruled over Assam from the 13th to the 18th centuries. The Ahoms built many temples, palaces, and other monuments in Sivasagar, which are now some of the most important tourist attractions in the city.
The Mughal Era was a period of Indian history that lasted from the 16th to the 18th centuries. The Mughals were a Muslim dynasty that ruled over a large part of India during this time. They built many beautiful monuments in India, but none of them are located in Sivasagar.
The British colonial period was a period of Indian history that lasted from the 18th to the 20th centuries. The British were a European power that ruled over India during this time. They built many important buildings in India, but none of them are located in Sivasagar.
The Pala Dynasty was a Hindu dynasty that ruled over Bengal from the 8th to the 12th centuries. They built many beautiful temples in Bengal, but none of them are located in Sivasagar.
Therefore, the correct answer to the question is: a) Ahom Kingdom.