Option 1 -> Correctly matches: arm against, accused of, blushed at, annoyed with - all standard collocations.
Option 2 -> Incorrect because "arm with" doesn't fit the context of protection from danger.
Option 3 -> Incorrect because "accused with" is grammatically wrong; the correct form is "accused of."
Option 4 -> Incorrect because "arm at" is not a valid collocation for this context.
Hence, Option 1: (A) - (III), (B) - (I), (C) - (IV), (D) - (II) -> The correct preposition collocations are: "arm ourselves against" (protect from danger), "accused of" (charged with a crime), "blushed at" (felt embarrassed by), and "annoyed with" (irritated by someone) -> correct