Correct Answer:
A. A song was sung by Danial.
Foundational Concept: This question tests the ability to convert an active voice sentence into its passive voice equivalent, specifically for the present continuous tense.
- Correct Option: B: A song is being sung by Danial. The active sentence 'Danial is singing a song' is in the present continuous tense (Subject + is/am/are + Verb-ing + Object). To convert this to passive voice, the structure is Object + is/am/are + being + Past Participle of Verb + by + Subject. This option correctly applies this rule.
- Distractor A: A song was sung by Danial. This is the passive voice for the simple past tense ('Danial sang a song').
- Distractor C: A song has been sung by Danial. This is the passive voice for the present perfect tense ('Danial has sung a song').
- Distractor D: A song will be sung by Danial. This is the passive voice for the simple future tense ('Danial will sing a song').