The Palas were:

The correct option is: a dynasty that appeared in eastern India.

Step-by-Step Explanation:

1. Origins of the Pala Empire: The Pala Empire was an imperial power during the post-classical period in the Indian subcontinent, which originated in the region of Bengal and Bihar (eastern India).

2. Establishment: The dynasty was founded by Gopala in the 8th century CE (around 750 CE). Gopala was chosen by a group of regional chieftains to bring stability and end the period of political anarchy (known as Matsyanyaya) in eastern India.

3. Geographical Reach: At its height, the Pala dynasty ruled over parts of modern-day West Bengal, Bihar, and Jharkhand, making it a prominent dynasty that appeared and flourished in eastern India.