How it's made
Most question banks invent their distractors. Ours can't — every wrong option is drawn from a map of confusions documented in the literature, and an item that can't prove where its distractors came from is never published.
We start from a documented mistake — two conditions that are genuinely mistaken for one another, and the finding that separates them. The question is written to test that discrimination. The distractors are the real confusions, not filler.
Not “D is correct.” Instead: why the finding that pulled you toward C cannot survive the sentence that rules it out. You leave knowing what to look for next time — which is the only thing that transfers to exam day.
Every item is attacked before it's published. The ones that don't survive are discarded, not patched — we would rather you never see a question than see a shaky one.
Mock questions live in a reserved pool that never appears in your study bank. You are never scored on a question you've already drilled — the only condition under which a mock score means anything. Holding those questions back costs us a large slice of the bank we could otherwise sell you. We think a mock score you can trust is worth more than a bigger number on a pricing page.