Select the correct passive form of the given sentence.
I have brought your book so that the difficult topics are understandable.
1
Your book have been brought by me so that the difficult topics are understandable.
2
Your book has been brought by me so that the difficult topics are understandable.
3
Your book has brought by me so that the difficult topics are understandable.
4
Your book has been brought me so that the difficult topics are understandable.