Veena had written a letter. (Choose the correct passive sentence.)

Active sentence: Veena had written a letter.

Tense: Past Perfect Tense (had written).

Rule for passive voice (Past Perfect Tense):

Object + had been + past participle (V³) + by + subject

Here,

• Object → a letter

• Verb → had been written

• Subject → by Veena

So, the correct passive sentence is: A letter had been written by Veena.

The other options are incorrect because:

• B. A letter is wrote by Veena - Incorrect tense ('is' = present) and wrong verb form ('wrote' instead of 'written').
• C. A letter was written by Veena - This is simple past passive, not past perfect passive
• D. Write a letter by Veena - Imperative form; not a passive sentence.