The correct answer is: a) Malabar.
Pazhassi Raja was a 19th-century Indian ruler who led a rebellion against British rule in the Malabar region of Kerala. He was born in 1753 into the royal family of the Kolathunadu dynasty, which ruled over a small principality in the Malabar region. Pazhassi Raja was a brave and charismatic leader, and he quickly gained a following among the people of Malabar. In 1790, he launched a rebellion against the British, who had recently taken control of the Malabar region. The rebellion lasted for several years, and Pazhassi Raja was eventually killed in battle in 1799. However, his rebellion inspired other Indian rulers to resist British rule, and it played a significant role in the Indian independence movement.
The other options are incorrect because they do not refer to the Malabar region. Option b), Travancore, is a region in the southern part of Kerala. Option c), Kochi, is a city in the central part of Kerala. Option d), Kollam, is a city in the southern part of Kerala.