Respuesta :
Nuestros padres son Roberto, y Mirna. (Our parents are Roberto and Mirna.)
All the others could also work if they had an S at the end ( mis/my, their/sus, your/ tus) but they don't, and it would also be informal, I believe.
All the others could also work if they had an S at the end ( mis/my, their/sus, your/ tus) but they don't, and it would also be informal, I believe.