'Preposition' (पूर्वसर्ग) का कार्य वाक्य में है:

उत्तर: (C) Show the relationship between a noun/pronoun and other words — Prepositions show relationships of: place (in, on, at, under), time (at, in, on, during, since), direction (to, from, towards), and manner (by, with). They always come before a noun/pronoun.