He was jailed for failing to obey the court injunction.
Correct Option: Answer is B
Explanation: In the given sentence, the person in question was jailed for not obeying the court injunction. An injunction is a legal order issued by a court that requires someone to take or refrain from taking a specific action. Therefore, the appropriate word to complete the sentence is “order,” as it accurately represents the court’s directive that the individual failed to comply with.