Mannequin 1 can only wear a red or a yellow skirt. That means there are only two possibilities for this question.
I found this question difficult to solve without drawing local diagrams, but easy to solve once you draw them.
Here’s what happens if mannequin 1 wears a red skirt.
Mannequin 2 wears a red jacket to match. So they also wear a navy hat, because they can’t wear all three colors. We can’t say much about mannequin 1’s hat and jacket.
Here’s what happens if mannequin 1 wears a yellow skirt.
Mannequin 2 wears the yellow jacket to match, and they’re forced to wear a navy hat. Otherwise they would wear all three colors.
Mannequin 1 has to wear a yellow hat and red jacket. Why? They can’t wear navy, because they’re already wearing yellow and red. And Mannequin 2 is already wearing the yellow jacket, so only red is left.
The only thing that both diagrams have in common is that mannequin 2 always wears the navy hat. C is CORRECT.
A is wrong because Mannequin 1 doesn’t have to wear the yellow hat in the first diagram. B, D and E are proven wrong by the second diagram.
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