Select the option that expresses the given sentence in the reported speech.
Ravi said to him, "Don't you know that I am your friend?"
1
Ravi asked him if he could know that I was his friend.
2
Ravi asked him if did he not know that I was his friend.
3
Ravi asked him if he did not know that I was his friend.
4
Ravi asked him why did he not know that I was his friend.