Which choice is an example of the superlative form?
a.
more annoying
b.
shy
c.
coldest
d.
hotter

When you hear "superlative" remember the super, like, superheroes are the BEST heroes. so you want to pick the adjective that is the highest level of its base adjective--coldest, for example, is like "the most cold." that's your answer. for superlatives, you always want to pick the one that's the "most."

sometimes these come in the form of adjectives ending in -est or -st (worst, happiest, ugliest), and sometimes they're phrased like "most" followed by an adjective (most acceptable, most impressive--not acceptablest or impressivest).

A and D are the comparative forms, like "this is hotter than that" or "this is more annoying than that." you're comparing them. and shy is just an adjective on its own, so it isn't your answer either.