Correct Answer:
Option B - : In the above sentence,
The most suitable preposition is 'of' because verb 'full' takes 'of' preposition in the sense of- 'abundant'.
The correct sentence- These boxes are very heavy. They are full of books.
B. : In the above sentence,
The most suitable preposition is 'of' because verb 'full' takes 'of' preposition in the sense of- 'abundant'.
The correct sentence- These boxes are very heavy. They are full of books.