The correct options are
A Majority charge carries in both regions
C Free electrons in the N - region
D Holes in the p - region
Potential barrier opposes the movement of electrons & holes across the junction and permits the minority charge carriers to drift across the PN junction. However, the potential barrier helps minority charge carriers in P-type and N-type to drift across the PN-junction, then an equilibrium will be established when the majority charge carriers are equal and both moving in reverse directions, so that the net result is zero current flowing in the circuit.