Final answer:
The interrogative sentence is option B: Who is going to the concert this Saturday?
Step-by-step explanation:
The interrogative sentence is option B: Who is going to the concert this Saturday? Interrogative sentences are sentences that ask a question. They typically begin with a question word like who, what, where, when, why, or how. In this sentence, the word 'who' is the question word, and the sentence is asking about the people going to the concert on a specific day.
Learn more about Identifying interrogative sentences