In the following question, a sentence has been given in Active/Passive Voice. Out of the four/five alternatives suggested, select the one which best expresses the same sentence in Passive/Active Voice. He was only ten years old when he composed this poem.

• A. He was only ten years old when he could compose this poem.
• B. He was only ten years old when the poem was composed by him.
• C. He was only ten years old when this poem had been composed by him.
• D. He was only ten years old when the poem has been composed by him.

Answer: (B)