Relative Pronouns in Persian grammar refers to the words that combine two sentences or phrases together. These pronouns are notably used to refer back to the noun or pronoun that was just mentioned, contributing largely to the fluency of speech or writing. The main Persian relative pronouns include “که” (that), “کی” (who), and “چه” (what). They function to provide additional details about a subject, object or a place while also serving as linking words, helping in the formation of complex sentences.