12. Six offices on a floor are allotted to A, B, C, D, E and F, respectively. The offices are arranged in two rows, one facing the nonh and the other facing the south. B got a north-facing office and is not next to D. D and F got diagonally opposite offices. C, whose office is next to F, got a south-facing office, and E got a north-facing office. Which of the following combinations got south-facing offices?