What is the correct line of the nursery rhyme? (Not a poll, this is a discussion)

1. There was a farmer had a dog and bingo was his name-o

2. There was a farmer who had a dog and bingo was his name-o

3. Once a farmer that had a dog and bingo was his name-o

4. Once a farmer had a dog and bingo was his name-o

5. Old MacDonald had a farm and bingo was his name-o