Select the option that expresses the given sentence in passive voice.

The teacher gave the question paper.

The question paper was given by the teacher.

The correct option that expresses the given sentence in passive voice is The question paper was given by the teacher.

The other options are incorrect because:

• The question paper was being given by the teacher is in the past progressive tense, while the original sentence is in the simple past tense.
• The question paper was gave by the teacher is grammatically incorrect. The verb "to give" is transitive, which means that it takes a direct object. However, the subject of the sentence is "the question paper," which is not a direct object.
• The question paper has been given by the teacher is in the present perfect tense, while the original sentence is in the simple past tense.