Explanation
In this vocabulary item, Blame is the closest synonym of Accuse, so option C is correct. The word Accuse and the word Blame share the same central sense in the context tested by the question, although usage, tone and grammatical form should still be checked before substituting one for the other. A synonym is not required to be identical in every possible sentence; it must preserve the intended meaning in the relevant context. Here, replacing Accuse with Blame keeps the core idea intact without reversing the tone or changing the action, quality or state expressed by the target word. The alternatives Industrious, Courteous and Fragile do not express the same central meaning as Accuse. This distinction matters because competitive examinations often place one accurate synonym beside three familiar but contextually unsuitable words. To verify Accuse independently, identify its part of speech, state a short definition, and place both Accuse and Blame in the same simple sentence. If the sentence retains its essential meaning and grammatical structure, the synonym relationship is supported. Learners should revise Accuse together with Blame, a brief usage cue and the contrasting distractors.