Question - . Consider the following statements about conditions that make a metal-semiconductor rectifying; (I) n-type semiconductor with its work function Os greater than the work function 4) n of the metal (2) n-type semiconductor with its work function Os smaller than the work function Om of the metal (3) p-type semiconductor with its work function 4)s greater than the work function Om of the metal (4) p-type semiconductor with its work function Os smaller than the work function Om of the metal Of these statements