Consider the following pairs: Heat treatment and Effects on medium carbon steel
1. Normalizing: Grain refinement
2. Full annealing: Uniform grain structure
3. Martempering: Decreased ductility
4. Spheroldizing: Maximum softness
Which of the pairs given above are correctly matched?
(a) 1 and 2 (b) 2 and 3
(c) 3 and 4 (d) 1, 2, 3 and 4