Consider the following steps involved in conditioning of metal powders in powder metallurgy techniques?
1. Pulverization 2. Blending of mixing
3. Screening 4. Heat Treatment
Which one of the following is the correct sequence of the above steps?
(a) 1 – 2 – 3 – 4 (b) 2 – 3 – 1 – 4 (c) 4 – 1 – 3 – 2 (d) 4 – 3 – 2 – 1