Drivers ahead of an ambulance read the word AMBULANCE correctly in their rear-view mirrors, as shown. Which panel shows how the word is actually painted on the front of the ambulance?

The painting must be the mirror image of what is to be read, because the rear-view mirror reverses it again. Reverse the order (E C N A L U B M A) and flip the B, L, N, C and E: (c). (a) would be read reversed in the mirror, and (b) and (d) are upside down.