If box 1 and 4 are the correctly labeled boxes, which of the following must be true?

If box 1 and 4 are the correctly labeled boxes, which of the following must be true?

• ক. Both box 1 and box 3 contains medium-size hats.
• খ. Both box 2 and box 3 contains small hats.
• গ. Both box 3 and box 4 contains medium-size hats.
• ঘ. Both box 1 and box 2 contains small hats.