Choose the correct option to change the following sentence from Active Voice to Passive Voice:

'I am to write a book'

A book is to be written by me.

The correct answer is Option (1) - A book is to be written by me.

In the given sentence, "I am to write a book," the structure indicates an obligation or intention in the present tense. To change this sentence into the passive voice, the subject ("I") becomes the agent ("by me"), and the object ("a book") becomes the subject.

1. A book is to be written by me.

   • Correct: This maintains the meaning and tense of the original sentence while converting it to the passive voice.

2. A book was to be written by me.

   • Incorrect: This changes the tense to the past, which does not match the original sentence.

3. A book is written by me.

   • Incorrect: This changes the structure and meaning, turning it into a simple present statement rather than an obligation or intention.

4. A book was written by me.

   • Incorrect: This changes both the tense and meaning of the original sentence.