One picture at a time, four condition names underneath. Every wrong choice is something the block teaches from the same family, and several of the pairs are the discrimination the lectures build the whole topic around — tense versus flaccid blisters, a scaly ring versus a scale-free one, a scar that stays inside the wound versus one that does not. Tap any picture to enlarge it.
Answers reveal only after you choose. Your score and a breakdown by objective appear at the end, with a review of everything you missed.