Consider the following statements:
1. Metal forming decreases harmful effects of impurities and improves mechanical strength.
2. Metal working process is a plastic deformation process.
3. Very intricate shapes can be produced by forging process as compared to casting process.
Which of the statements given above are correct?
(a) 1, 2 and 3 (b) 1 and 2 on1y
(c) 2 and 3 only (d) 1 and 3 only