Identify the Interrogative sentence:

The correct answer is Option (4) → Your brother has already gone back to Pune, hasn’t he?

Interrogative sentence:

• An interrogative sentence asks a question. It ends with a question mark.
• This sentence ends with the short question “hasn’t he?”. It asks the listener to agree, so the whole sentence is a question.

Why the Other Options are Incorrect?

Option 1: I wonder whether the library stays open on Sundays. — Incorrect. It only tells us what the speaker is thinking, so it is an assertive sentence.

Option 2: Do bring your umbrella to the temple fair tomorrow. — Incorrect. It starts with “Do”, but it asks someone to do something. So it is an imperative sentence.

Option 3: How quickly the tickets for the final match were sold! — Incorrect. It shows a strong feeling of surprise, so it is an exclamatory sentence.