Consider the following statements about conditions that make a metal semiconductor contact rectifying 1. N type semiconductor with work function φs more than work function φM of metal2. N type semiconductor with work function φs less than work function φM of metal3. P type semiconductor with work function φs more than work function φM of metal4. P type semiconductor with work function φs less than work function φM of metalOf these statements

• A. 1 and 3 are correct
• B. 2 and 3 are correct
• C. 1 and 4 are correct
• D. 2 and 4 are correct