If a={2,4,6,8,10} and b={4,8,10},then which of the following statements is false

Given this information, which expression must represent the value of b?

Bruce is getting materials for a chemistry experiment his teacher gives him a container that has 0.25 liter of liquid in it.bruce need to use 0.4 of this liquid for the experiment. how much liquid will bruce use?

Anyone know? will mark brainliest if you're correct!