Explanation:

- Pushyabhuti was a significant ruler known for establishing a dynasty in ancient India.

- He ruled from Thaneswar, a region in the northern part of India.

- Option 3: Vardhana

- This is the correct answer.

- The Vardhana dynasty was founded by Pushyabhuti.

- It is sometimes referred to as the Pushyabhuti dynasty.

- Option 1: Chera

- The Chera dynasty was based in the southern part of India.

- It is not related to Pushyabhuti.

- Option 2: Pandya

- The Pandya dynasty was also based in southern India.

- It is known for its Tamil rule and is not linked with Thaneswar.

- Option 4: Chalukya

- Originated in South and West India.

- Not associated with Pushyabhuti or Thaneswar.