- A4
- B1
- C5
- D6
Step-by-Step Solution
Take 2 as the base. 4 and 5 fold up as the left and right walls, 3 folds up at the front, 1 (attached to the top of 5) becomes the back wall, and 6 (attached to 1) folds over as the lid. So the 3 at the front is opposite the 1 at the back, and 2 is opposite 6.
Answer: B) 1