In play the Mrichchhakatika, the hero Charudatta was described as both a Brah mana and a ____.

The correct option is Sarthavaha.

In the classical Sanskrit play Mrichchhakatika (The Little Clay Cart), written by King Shudraka, the hero Charudatta is depicted as a noble and impoverished young man living in the ancient city of Ujjayini.
While Charudatta is a Brahmana by birth, he is also described as a merchant or caravan leader by profession, which is referred to as a Sarthavaha in Sanskrit literature.

The distinction between the options helps clarify this choice:
1. Sarthavaha: This term historically refers to a caravan leader, trader, or merchant. In the play, Charudatta's family was known for its trade activities and philanthropic works, which led to his poverty.
2. Nishada: This refers to forest-dwelling tribal communities or hunters, which is unrelated to Charudatta's social background.
3. Kshatriya: This represents the warrior or ruling class, whereas Charudatta is explicitly identified as a Brahmana.
4. Mlechchha: This term was used to refer to foreigners or people outside the traditional Vedic social fold, which does not apply to a respected Brahmana citizen like Charudatta.