Explanation:

Samrat Ashoka, the Mauryan emperor, appointed officials known as Rajukas (Option C) to administer justice and welfare in his empire. These officers were responsible for the well-being of the people in their respective districts and had judicial powers. Sharmana (Option A) refers to wandering ascetics. Kumar Amatya (Option B) were high-ranking officials, often princes or close relatives, holding important administrative posts. Uparika (Option D) were provincial governors or administrators in later periods, not specifically judicial officers appointed by Ashoka for general justice administration.