The word Vindicate means to clear someone of blame or suspicion, or to show or prove to be right, reasonable, or justified. It implies defending or proving the validity of something or someone against criticism or doubt. Therefore, the most fitting synonym among the options is Justify (option B).
When you vindicate someone, you provide evidence or arguments that prove their innocence or correctness. For example, new evidence might “vindicate a wrongly accused person,” or a successful outcome might “vindicate a controversial decision.” Option A, “Blame,” is an antonym, meaning to assign responsibility for a fault. Option C, “Punish,” refers to imposing a penalty, which is unrelated to proving innocence or correctness. Option D, “Accuse,” means to charge someone with an offense, which is the opposite of vindicating them. Understanding “vindicate” is crucial for describing situations where truth or righteousness is established after a period of doubt or accusation.