Which of the following are produced by powder metallurgy process?
1. Cemented carbide dies
2. Porous bearings
3. Small magnets
4. Parts with intricate shapes
Select the correct answer using the codes given below
(a) 1, 2 and 3 (b) 1, 2 and 4 (c)2, 3 and 4 (d) 1, 3 and 4