Choose the option in which VOICE has been correctly changed into Passive Voice.
She is writing a letter.

Correct option is D

The correct passive voice of the given sentence is (d) A letter is being written by her.
• Active Voice: The subject performs the action.
• Passive Voice: The subject receives the action.
• The given sentence is in Present Continuous Tense (“is writing”).
• While changing active to passive, the tense must remain the same.
• Present Continuous Passive structure: is/are + being + past participle (V³).
Grammatical rule used:
Active Voice: Subject + is/are + verb-ing + object
Passive Voice: Object + is/are + being + verb-V³ + by + subject
Example:
Active: She is cleaning the room.
Passive: The room is being cleaned by her.
Why other options are incorrect:
• (a) was being written → Past Continuous (tense changed)
• (b) has been written → Present Perfect (tense changed)
• (c) was written → Simple Past (tense changed)
Hence, option (d) is the correct answer.