Which term describes a person sentenced to serve a prison term of one to three years?

The term that accurately describes a person sentenced to serve a prison term of one to three years is best captured by the designation of "Provincial Prisoner." This term is generally used to refer to individuals who are incarcerated in provincial or regional correctional facilities, often based on the length of their sentence which falls within the jurisdiction of provincial law.

In many jurisdictions, sentences that are relatively short, such as one to three years, are typically served in local jails or provincial prisons rather than federal institutions. These facilities are tasked with housing individuals who have committed less severe offenses and received sentences that do not exceed the limits set by provincial law.

The other terms do not align with this usage; for example, a municipal prisoner may refer to someone held in a city jail, usually for shorter-term or pretrial detention. City prisoner might imply a similar local designation but lacks the specificity regarding the length of the sentence. National prisoner generally indicates someone serving a longer sentence in a federal facility, which is not applicable in this context. Therefore, "Provincial Prisoner" clearly encompasses the category of individuals serving sentences of one to three years in the appropriate correctional setting.