In the following question, out of the four alternatives, select the alternative which will improve the bracketed part of the sentence. In case no improvement is needed, select "no improvement". No sooner (do the phone ring), he was out of the home.?

Option 3 : Did the phone ring

The correct answer is did the phone ring

• No sooner is used to show that one thing happens immediately after another thing. It is often used with the past perfect or simple past and usually followed by 'than'.
• The preposition 'than' is used in expressions indicating one thing happening immediately after another.
• When a sentence begins with negative adverbs like Hardly, scarcely, no sooner, etc inversion of the sentence takes place. In such a case helping verb should come before the main verb.
• 'did' is always followed by the V₁ form of the verb.

​The correct sentence is: No sooner did the phone ring, he was out of the home.