Explanation:

- Option:1, Ashoka

- Ashoka was the third emperor of the Maurya Dynasty.

- Known for spreading Buddhism, he did not adopt the title of "Varman."

- Option:2, Kamarupa

- Kamarupa refers to an ancient state in northeastern India.

- The rulers of this region often adopted the title "Varman."

- Option:3, Chandragupta I

- Chandragupta I was a Gupta emperor who reigned in early India.

- He did not adopt the title "Varman."

- Option:4, Chandragupta II

- Chandragupta II was another prominent Gupta emperor.

- Like Chandragupta I, he did not use "Varman" as a title.

- Correct Answer:

- Option:2, Kamarupa