Which of the following was a significant feudatory state under the Chola Empire?

The correct answer is: a) Kongu Nadu

Kongu Nadu was a significant feudatory state under the Chola Empire. It was located in the southern part of India, and its capital was Coimbatore. The Kongu people were known for their martial prowess, and they played a key role in the Chola army. The Kongu region was also a major center of trade and commerce.

The other options are incorrect because:

• Madurai Nayaks was a dynasty that ruled the Madurai region of southern India from the 16th to the 18th centuries.
• Pudukkottai was a princely state in southern India that existed from the 16th to the 20th centuries.
• Thanjavur Nayaks was a dynasty that ruled the Thanjavur region of southern India from the 16th to the 18th centuries.