Question

We are certain __ victory​

Answer 1

We are certain $\boxed{ of }$ victory.

$\large\bold{\underline{\underline{Explanation:-}}}$

A preposition is defined as a word or group of words that is used before a noun, pronoun, or noun phrase to show direction, time, place, location, spatial relationships, or to introduce an object.

Examples of preposition :- after, at, before, behind, by, during, for, from, in, of, over, past, to, under, up, etc.