A plain carbon steel was annealed just above the eutectoid temperature. Microstructural analysis revealed that the proeutectoid ferrite content was 30 wt%. The eutectoid reaction in the iron-iron carbide phase diagram is given below: cooling y (0.76 wt% C) heating The carbon content of the steel (in wt%) is (A) 0.24 (B) 0.34 a (0.022 wt% C) + Fe3C (6.7 wt% C) (C) 0.44 (D) 0.54