MIG welding process uses

Question

Consider the following statements:

MIG welding process uses   

1. Consumable electrode

2. non – consumable electrode

3. dc power supply

4. ac power supply

Which of these statements are correct?

(a) 2 and 4                      (b) 2 and 3

(c) 1 and 4                   (d) 1 and 3