During heat treatment of steel, the hardness ofvarious structures in increasing order is(a)…

During heat treatment of steel, the hardness ofvarious structures in increasing order is(a) Martensite, fine pearlite, coarse pearlite,spherodite(b) Fine pearlite, coarse pearlite, spherodite,martensite(c) Martensite, coarse pearlite, fine pearlite,spherodite(d) Spherodite, coarse pearlite, fine pearlite,martensite