The Sadiya Frontier Tract was historically associated with the:

The correct answer is: a) Kachari Kingdom.

The Sadiya Frontier Tract was a region in the eastern Himalayas that was historically associated with the Kachari Kingdom. The Kachari Kingdom was a powerful kingdom that ruled over much of the Brahmaputra Valley in the 13th and 14th centuries. The kingdom was founded by the Kachari people, who are an ethnic group that is native to the region. The Kachari Kingdom was eventually conquered by the Ahom Kingdom in the 16th century, but the Kachari people continued to live in the region and their culture has had a significant influence on the culture of the Assamese people.

The other options are incorrect because:

• The Chutiya Kingdom was a kingdom that ruled over the region that is now known as Arunachal Pradesh.
• The Pala Dynasty was a dynasty that ruled over Bengal in the 8th to 12th centuries.
• The Kamarupa Kingdom was a kingdom that ruled over the Brahmaputra Valley in the 7th to 12th centuries.