Concept:
Voice transformation involves changing the structure of a sentence from active voice to passive voice without changing its original meaning.
In an active voice sentence:
• The subject performs the action.
• The object receives the action.
In a passive voice sentence:
• The object becomes the subject.
• The action is expressed through a passive verb structure.
• The original subject is introduced using the preposition “by.”
The given sentence uses the verb “wrote,” which is in the Simple Past Tense.
The passive structure for a Simple Past sentence is:
\[
\text{Object} + \text{was/were} + \text{V}_3 + \text{by} + \text{Subject}
\]
Step 1: Identifying the grammatical components.
The sentence is:
\[
\text{Bana wrote Kadambari.}
\]
Its components are:
• Subject : Bana
• Verb : wrote
• Object : Kadambari
The object Kadambari is singular.
Therefore, the passive auxiliary verb will be “was.”
Step 2: Converting the sentence into passive voice.
Using the Simple Past Passive formula:
\[
\text{Object} + \text{was} + \text{V}_3 + \text{by} + \text{Subject}
\]
Substituting the required components:
\[
\text{\textit{Kadambari}} + \text{was} + \text{written} + \text{by Bana}
\]
Thus, the passive sentence becomes:
\[
\text{\textit{Kadambari} was written by Bana.}
\]
Step 3: Checking each option carefully.
• Kadambari wrote Bana
This sentence incorrectly reverses the meaning and remains in active voice.
Hence, it is incorrect.
• Kadambari is written by Bana
This changes the tense from Simple Past to Simple Present Passive.
Hence, it is incorrect.
• Kadambari was written by Bana
This preserves both the meaning and the Simple Past Tense.
Hence, it is correct.
• Bana was writing {Kadambari
This changes the tense to Past Continuous and remains active.
Hence, it is incorrect.
Step 4: Final verification.
The object has correctly become the subject, the Simple Past Tense has been preserved, and the verb has been converted into its passive structure.
Therefore, the correct answer is:
\[
\boxed{\text{\textit{Kadambari} was written by Bana}}
\]