The correct option is D they will meet
Let’s examine the sentence: “Does anybody know where ____ ?” The sentence is in the form of a question and it has two clauses. The first clause is in the interrogative form with question starting with ‘does.’ Do or does questions have the following structure: Do/Does + Subject + Base Verb. The first clause matches this structure with Do + anybody (as subject) + know (as base verb). The second clause is a statement. Hence, it will begin with subject (noun or pronoun) and not a verb. As only Option D meets this condition, it is the correct answer.