To which varna do priests, teachers and protectors belong in Hinduism?

Brahmin are a varna (class) in Hinduism. They specialised as priests (purohit, pandit, or pujari), teachers (acharya or guru) and protectors of sacred learning across generations.

The traditional occupation of Brahmins was that of priesthood at the Hindu temples or at socio-religious ceremonies and rite of passage rituals such as solemnising a wedding with hymns and prayers. Theoretically, the Brahmins were the highest ranking of the four social classes. In practice, Indian texts suggest that Brahmins were agriculturalists, warriors, traders and have held a variety of other occupations in the Indian subcontinent.

The earliest inferred reference to "Brahmin" as a possible social class is in the Rigveda, occurs once, and the hymn is called Purusha Sukta. According to this hymn in Mandala 10, Brahmins are described as having emerged from the mouth of Purusha, being that part of the body from which words emerge. This Purusha Sukta varna verse is now generally considered to have been inserted at a later date into the Vedic text, possibly as a charter myth. Stephanie Jamison and Joel Brereton, a professor of Sanskrit and Religious studies, state, "there is no evidence in the Rigveda for an elaborate, much-subdivided and overarching caste system", and "the varna system seems to be embryonic in the Rigveda and, both then and later, a social ideal rather than a social reality".