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

Only B and C

Point to be remember :

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

Lets start to solve the question :

4  will be opposite to 1

6  will be opposite to 2

3 will be opposite to  5

therefore option 2 is correct it can be formed

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