What kind of change is crystallization?

The correct options are
A Reversible
C Physical
Crystallization is a physical change as no new substance is formed.
Crystallization is the process of separating a soluble solid from the solution by heating or evaporating the solvent. The same solid which has become crystal can be dissolved again by adding the liquid which was evaporated. In this way the original state of the solution can be achieved again. So it is a reversible change.