@vnawrath The key is distinguishing between random and conscious answers. To find the solution, a link between those two needs to be made from each to the options to all others. Doing that, you end up connecting the "randomly correct" answers A and D to the "consciously correct" answer C: there's one consciously correct option, which is why the random answers must say "25%", and the two random correct answers, which is why the one consciously correct answer must say "50%".