Is matter conserved when there is the same amount before and after a change?

Matter is anything that has mass and takes up space.  Matter can change form through physical and chemical changes, but through any of these changes, matter is conserved. The same amount of matter exists before and after the change none is created or destroyed. This concept is called the Law of Conservation of Mass.

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be