Q. Who among the following was the author of Abhidhamma treatise Kathavatthu?
Answer: Moggaliputta Tissa.
Notes: The Abhidhamma treatise Kathavatthu was written by Moggaliputta Tissa. He was a Buddhist monk and scholar who lived in the 3rd century BC . Moggaliputta-Tissa was the spiritual teacher of the Mauryan Emperor Ashoka, and his son Mahinda, who brought Buddhism to Sri Lanka. He also presided over the Third Buddhist Council.