Beside uneven concentration, what is another major consequence of solute rejection?

a) None. Segregation is the only major consequence.

b) Re-melting of just formed solid, which is called recalescence.

c) Periodically oscillating solidification rate which follows the periodic nature of solute rejection.

d) Creation of a boundary layer next to the solidification front with elevated melting point. Depending on the temperature gradient in the melt, that boundary layer may be undercooled (supercooled), which creates unstable solid-liquid interface.