I am going to write a letter. Choose the option in which VOICE in the above…

Concept: Converting active voice to passive voice must preserve the original sentence's tense and aspect, not just swap the subject and object. For the 'be going to' near-future construction, the passive keeps the same auxiliary pattern: (am/is/are) + going to + be + past participle. Only the object of the active sentence becomes the new subject; the verb group itself is rewritten as the passive infinitive ('to be' + past participle).

Application: Converting the sentence step by step.

1. The object of the active sentence, 'a letter', becomes the subject of the passive sentence.

2. The verb group 'am going to write' becomes 'is going to be written': the auxiliary 'am' changes to 'is' to agree with the new singular subject 'a letter', and the main verb 'write' becomes the passive infinitive 'be written'.

3. Adding the agent 'by me' gives the complete passive sentence: 'A letter is going to be written by me.'

Cross-check: Comparing against the other tense forms offered.

• Present continuous passive ('is being written') corresponds to the active 'I am writing a letter' (an action in progress right now), not to 'am going to write'.

• Simple present passive ('is written') corresponds to the active 'I write a letter' (a habitual or general fact), which does not match the original sentence's near-future intention.

• Future passive with 'will' ('will be written') corresponds to the active 'I will write a letter' (a plain future decision or prediction), which does not preserve the specific 'going to' pre-planned intention of the original sentence.

Answer: A letter is going to be written by me.