Select the dice that can be formed by folding the given sheet along the lines.

Only A and B

Point to be remember :

In an open dice alternate number is opposite to each other.

Lets start to solve the question :

3  will be opposite to 5

2  will be opposite to 6

1 will be opposite to  4

therefore option 3 is correct it can be formed   ( Only A and B)

Because we know that opposite number cannot be adjacent to each other or share the corner with each other