Cold forging results in improved quality due to which of the following?
1. Better mechanical properties of the process.
2. Unbroken grain flow.
3. Smoother finishes.
4. High pressure.
Select the correct answer using the code given below:
(a) 1, 2 and 3 (b) 1, 2 and 4
(c) 2, 3 and 4 (d) 1, 3 and 4