Identify the correct arrangement (in ascending order) of the hardness of structures of steel while undergoing a heat treatment process.
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