In the following question, a sentence has been given in Active/Passive voice. Out of the four alternatives suggested, select the one which best expresses the same sentence in Passive/Active voice. I wrote a harsh letter to the editor.

• Writing of a harsh letter has been done by me to the editor.
• I myself have written a letter which is harsh to the editor.
• The editor will get a harsh letter which I wrote.
• A harsh letter was written by me to the editor.