He said, "Can you sing?" And I said, "No"

He said, "Can you sing?" And I said, "No"

1. a) He asked me that could I sing and I refused.
2. b) He asked me if I could sing and I said that I couldn't.
3. c) I denied, when he asked me if I could sing.
4. d) He asked me if I could sing and I said no.