During heat treatment of steel, the hardness of various

During heat treatment of steel, the hardness of various structures in increasing order is

1. martensite, fine pearlite, coarse pearlite, spherodite
2. fine pearlite, martensite, spherodite, coarse pearlite
3. martensite, coarse pearlite, fine pearlite, spherodite
4. spherodite, coarse pearlite, fine pearlite, martensite

Spherodite, Coarse Pearlite, Fine Pearlite, Martensite