✔ Correct Answer: A. The teacher had entered the room when the bell rang.

The correct answer to the question “Choose the correct sentence: The teacher had entered the room when the bell rang., The teacher has entered the room when the bell rang., The teacher had enter the room when the bell rang., None of these” is The teacher had entered the room when the bell rang.. This question belongs to Grammar Concepts & Terms in English. Practice the related questions below to master this topic for your FPSC, PPSC and NTS tests.