Go through the following graph and answer the following questions.
Which of the following reaction is true?
A. Reduction of calcined/roasted haematite ore to pig iron in blast furnance takes place in the lower temperature range and in the higher temperature range by CO and C respectively
B. The reduction of zinc oxide using coke takes place at higher temperature than that in case of copper
C. It is quite easyf to reduce oxide ores of copper directly to the metal by heating with coke after 500-600K.
D. All of these
