A study desk stands under a mirror fixed flat on the ceiling. An open laptop is on the left of the desk and an orange mug on the right. Which panel shows the desk in the ceiling mirror?

A flat mirror above turns the picture upside down but keeps left and right: the legs point up, the desk top is near the bottom, and the laptop (still on the left) and the mug (still on the right) hang below it: (d). (a) swaps the laptop and the mug, (b) is the desk itself and (c) does both.