A piece of paper is folded and a cut is made, from the given options indicate how it will appear when opened.

The correct answer is Option (3).

If we see very cautiously at the last figure we will found that,

if this shape is gets unfolded then there must be two short triangles at the upper part and the bottom part with same base of the triangles.

So, go with the options only option c satisfying the given conditions.