Which pronoun is considered singular third person?

The correct answer is "Anyone" because it functions as a singular third-person pronoun. In English grammar, the singular third-person is used to refer to an individual person or thing that is not the speaker or the listener. "Anyone" implies a single, undefined individual, making it singular.

"Everyone" is also singular but refers to all members of a group collectively, rather than to an individual. While "Someone" can similarly be classified as a singular third-person pronoun, "Somebody" specifically conveys an indefinite individual and is often used interchangeably with "someone" but does not appear as a choice here. The term "Noone," which is typically misspelled and should be "no one," refers to no individuals at all, making it not applicable as a singular third-person pronoun. Thus, "Anyone" clearly meets the criteria for singular third-person use.