Here we are asked to make everything a different color. The first scenario works. If light 1 is green and light 2 is purple then that triggers no rules. We could make the third bulb Y, which is a different color from the first two. That does trigger the third rule, but it’s already true: P is in the second spot. A is CORRECT.
B is wrong because the third color is purple. If we put purple in spot 3 then that triggers rule 3 and forces 2 to be purple, too.
C is also wrong because of rule 3. If yellow is in line 3 then purple is in line 2. But purple is already in spot 1 in this answer choice.
D is wrong because of rule 2. If green is in light 2 then green must be in light 1
E is wrong because of rule 3. If P is in light 3 then P also has to be in light 2.
Leave a Reply