Q. The given sentence is in active/ passive voice. Change the voice of the sentence. Select the correct option from the sentence below.
She has preserved all the old letters of her dead lover.
a. All the old letters of her dead lover have been preserved by her.
b. All the old letters of her dead lover has been preserved by her.
c. All the old letters have been preserved.
d. The letters of her old lover have been preserved.
No explanation is available for this question!